diff --git a/planetstack/openstack/driver.py b/planetstack/openstack/driver.py
index b6b6d48..c4f2fd6 100644
--- a/planetstack/openstack/driver.py
+++ b/planetstack/openstack/driver.py
@@ -18,12 +18,12 @@
         else:
             self.shell = OpenStackClient()
 
-    def create_role(self, name): 
+    def create_role(self, name):
         roles = self.shell.keystone.roles.findall(name=name)
         if not roles:
             role = self.shell.keystone.roles.create(name)
         else:
-            role = roles[0] 
+            role = roles[0]
         return role
 
     def delete_role(self, filter):
@@ -56,7 +56,7 @@
         for tenant in tenants:
             # nova does not automatically delete the tenant's instances
             # so we manually delete instances before deleteing the tenant   
-            instances = self.shell.nova_db.instance_get_all_by_filters(ctx, 
+            instances = self.shell.nova_db.instance_get_all_by_filters(ctx,
                        {'project_id': tenant.id}, 'id', 'asc')
             client = OpenStackClient(tenant=tenant.name)
             driver = OpenStackDriver(client=client)
@@ -210,7 +210,7 @@
         for snet in subnets:
             if snet['cidr'] == cidr_ip and snet['network_id'] == network_id:
                 subnet = snet
- 
+
         if not subnet:
             allocation_pools = [{'start': start, 'end': end}]
             subnet = {'subnet': {'name': name,
@@ -218,7 +218,7 @@
                                  'ip_version': ip_version,
                                  'cidr': cidr_ip,
                                  'dns_nameservers': ['8.8.8.8', '8.8.4.4'],
-                                 'allocation_pools': allocation_pools}}          
+                                 'allocation_pools': allocation_pools}}
             subnet = self.shell.quantum.create_subnet(subnet)['subnet']
             self.add_external_route(subnet)
         # TODO: Add route to external network
@@ -328,9 +328,22 @@
         keys = self.shell.nova.keypairs.findall(id=id)
         for key in keys:
             self.shell.nova.keypairs.delete(key) 
-        return 1 
+        return 1
 
-    def spawn_instance(self, name, key_name=None, hostname=None, image_id=None, security_group=None, pubkeys=[]):
+    def get_private_networks(self, tenant=None):
+        if not tenant:
+            tenant = self.shell.nova.tenant
+        tenant = self.shell.keystone.tenants.find(name=tenant)
+        search_opts = {"tenant_id": tenant.id, "shared": False}
+        private_networks = self.shell.quantum.list_networks(**search_opts)
+        return private_networks
+
+    def get_shared_networks(self):
+        search_opts = {"shared": True}
+        shared_networks = self.shell.quantum.list_networks(**search_opts)
+        return shared_networks
+
+    def spawn_instance(self, name, key_name=None, hostname=None, image_id=None, security_group=None, pubkeys=[], networks=None):
         flavor_name = self.config.nova_default_flavor
         flavor = self.shell.nova.flavors.find(name=flavor_name)
         #if not image:
@@ -354,7 +367,8 @@
                                             security_group = security_group,
                                             files=files,
                                             scheduler_hints=hints,
-                                            availability_zone=availability_zone)
+                                            availability_zone=availability_zone,
+                                            networks=networks)
         return server
           
     def destroy_instance(self, id):
diff --git a/planetstack/openstack/manager.py b/planetstack/openstack/manager.py
index 3ae7dea..7990269 100644
--- a/planetstack/openstack/manager.py
+++ b/planetstack/openstack/manager.py
@@ -301,17 +301,35 @@
             #del_route = 'route del -net %s' % self.cidr
             #commands.getstatusoutput(del_route)
 
+    def get_requested_networks(self, slice):
+        network_ids = [x.network_id for x in slice.networks.all()]
+
+        if slice.network_id is not None:
+            network_ids.append(slice.network_id)
+
+        networks = []
+        for network_id in network_ids:
+            networks.append({"uuid": network_id})
+
+        return networks
+
     @require_enabled
     def save_sliver(self, sliver):
         if not sliver.instance_id:
+            if (sliver.slice.name == "smbaker-slice-8") or (sliver.slice.name.startswith("smbaker-slice-net")):
+                # only inflict this pain on myself, for now...
+                requested_networks = self.get_requested_networks(sliver.slice)
+            else:
+                requested_networks = None
             slice_memberships = SliceMembership.objects.filter(slice=sliver.slice)
             pubkeys = [sm.user.public_key for sm in slice_memberships if sm.user.public_key]
-            pubkeys.append(sliver.creator.public_key) 
+            pubkeys.append(sliver.creator.public_key)
             instance = self.driver.spawn_instance(name=sliver.name,
                                    key_name = sliver.creator.keyname,
                                    image_id = sliver.image.image_id,
                                    hostname = sliver.node.name,
-                                   pubkeys = pubkeys )
+                                   pubkeys = pubkeys,
+                                   networks = requested_networks )
             sliver.instance_id = instance.id
             sliver.instance_name = getattr(instance, 'OS-EXT-SRV-ATTR:instance_name')
 
@@ -368,7 +386,7 @@
         from core.models.image import Image
         # collect local images
         images = Image.objects.all()
-        images_dict = {}    
+        images_dict = {}
         for image in images:
             images_dict[image.name] = image
 
@@ -391,4 +409,129 @@
         old_image_names = set(images_dict.keys()).difference(glance_images_dict.keys())
         Image.objects.filter(name__in=old_image_names).delete()
 
+    @require_enabled
+    def save_network(self, network):
+        if not network.network_id:
+            network_name = network.name
+
+            # create network
+            os_network = self.driver.create_network(network_name)
+            network.network_id = os_network['id']
+
+            # create router
+            router = self.driver.create_router(network_name)
+            network.router_id = router['id']
+
+            # create subnet
+            next_subnet = self.get_next_subnet()
+            cidr = str(next_subnet.cidr)
+            ip_version = next_subnet.version
+            start = str(next_subnet[2])
+            end = str(next_subnet[-2])
+            subnet = self.driver.create_subnet(name=network_name,
+                                               network_id = network.network_id,
+                                               cidr_ip = cidr,
+                                               ip_version = ip_version,
+                                               start = start,
+                                               end = end)
+            network.subnet = cidr
+            network.subnet_id = subnet['id']
+            # add subnet as interface to slice's router
+            self.driver.add_router_interface(router['id'], subnet['id'])
+            # add external route
+            self.driver.add_external_route(subnet)
+
+        network.save()
+        network.enacted = datetime.now()
+        network.save(update_fields=['enacted'])
+
+    def delete_network(self, network):
+        if (network.router_id) and (network.subnet_id):
+            self.driver.delete_router_interface(network.router_id, network.subnet_id)
+        if network.subnet_id:
+            self.driver.delete_subnet(network.subnet_id)
+        if network.router_id:
+            self.driver.delete_router(network.router_id)
+        if network.network_id:
+            self.driver.delete_network(network.network_id)
+
+    def find_or_make_template_for_network(self, name):
+        """ Given a network name, try to guess the right template for it """
+
+        # templates for networks we may encounter
+        if name=='nat-net':
+            template_dict = {"name": "private-nat", "visibility": "private", "translation": "nat"}
+        elif name=='sharednet1':
+            template_dict = {"name": "dedicated-public", "visibility": "public", "translation": "none"}
+        else:
+            template_dict = {"name": "private", "visibility": "private", "translation": "none"}
+
+        # if we have an existing template return it
+        templates = NetworkTemplate.objects.filter(name=template_dict["name"])
+        if templates:
+            return templates[0]
+
+        template = NetworkTemplate(**template_dict)
+        template.save()
+        return template
+
+    def refresh_networks(self):
+        # get a list of all networks in the model
+
+        networks = Network.objects.all()
+        networks_by_name = {}
+        networks_by_id = {}
+        for network in networks:
+            networks_by_name[network.name] = network
+            networks_by_id[network.network_id] = network
+
+        # Get a list of all shared networks in OS
+
+        os_networks = self.driver.shell.quantum.list_networks()['networks']
+        os_networks_by_name = {}
+        os_networks_by_id = {}
+        for os_network in os_networks:
+            os_networks_by_name[os_network['name']] = os_network
+            os_networks_by_id[os_network['id']] = os_network
+
+        for (uuid, os_network) in os_networks_by_id.items():
+            #print "checking OS network", os_network['name']
+            if (os_network['shared']) and (uuid not in networks_by_id):
+                # Only automatically create shared networks. This is for Andy's
+                # nat-net and sharednet1.
+
+                owner_slice = Slice.objects.get(tenant_id = os_network['tenant_id'])
+                template = self.find_or_make_template_for_network(os_network['name'])
+
+                # Make a best-effort attempt to figure out the subnet. If we
+                # cannot determine the subnet, then leave those fields blank.
+                subnet_id = None
+                subnet = None
+                if os_network['subnets']:
+                    subnet_id = os_network['subnets'][0]
+                    os_subnets = self.driver.shell.quantum.list_subnets(id=subnet_id)['subnets']
+                    if os_subnets:
+                        subnet = os_subnets[0]['cidr']
+
+                if owner_slice:
+                    #print "creating model object for OS network", os_network['name']
+                    new_network = Network(name = os_network['name'],
+                                          template = template,
+                                          owner = owner_slice,
+                                          network_id = uuid,
+                                          subnet_id = subnet_id)
+                    new_network.save()
+
+        for (network_id, network) in networks_by_id.items():
+            # If the network disappeared from OS, then reset its network_id to None
+            if (network.network_id is not None) and (network.network_id not in os_networks_by_id):
+                network.network_id = None
+
+            # If no OS object exists, then saving the network will create one
+            if (network.network_id is None):
+                #print "creating OS network for", network.name
+                self.save_network(network)
+            else:
+                pass #print "network", network.name, "has its OS object"
+