Added in PLUser as custom user, replacing the django base user.  Reformatted initial_data for content with more readable 4 space indent for ability to do diffs
diff --git a/plstackapi/core/admin.py b/plstackapi/core/admin.py
index e53b245..7e19cf1 100644
--- a/plstackapi/core/admin.py
+++ b/plstackapi/core/admin.py
@@ -1,10 +1,13 @@
 from plstackapi.core.models import Site
 from plstackapi.core.models import *
 from django.contrib import admin
+from django.contrib.auth.models import Group
+
 from django import forms
 from django.utils.safestring import mark_safe
 from django.contrib.auth.admin import UserAdmin
 from django.contrib.admin.widgets import FilteredSelectMultiple
+from django.contrib.auth.forms import ReadOnlyPasswordHashField
 
 
 class ReadonlyTabularInline(admin.TabularInline):
@@ -83,22 +86,6 @@
     inlines = [NodeInline,]
     search_fields = ['name']
 
-class UserForm(forms.ModelForm):
-    class Meta:
-        password = forms.CharField(widget=forms.PasswordInput)
-        model = User
-        widgets = {
-            'password': forms.PasswordInput(),
-        }
-
-class UserAdmin(admin.ModelAdmin):
-    form = UserForm
-    fieldsets = [
-        ('User', {'fields': ['firstname', 'lastname', 'email', 'password', 'phone', 'user_url', 'is_admin', 'site']})
-    ]
-    list_display = ['firstname', 'lastname', 'email', 'password', 'phone', 'user_url', 'is_admin', 'site']
-    search_fields = ['email'] 
-
 class KeyAdmin(admin.ModelAdmin):
     fieldsets = [
         ('Key', {'fields': ['name', 'key', 'type', 'blacklisted', 'user']})
@@ -112,6 +99,7 @@
 
 class SubnetAdmin(admin.ModelAdmin):
     fields = ['cidr', 'ip_version', 'start', 'end', 'slice']
+    list_display = ('slice','cidr', 'start', 'end', 'ip_version' )
 
 class ImageAdmin(admin.ModelAdmin):
     fields = ['image_id', 'name', 'disk_format', 'container_format']
@@ -136,7 +124,7 @@
         model = Sliver
         widgets = {
             'ip': PlainTextWidget(),
-        } 
+        }
 
 class SliverAdmin(admin.ModelAdmin):
     form = SliverForm
@@ -145,6 +133,85 @@
     ]
     list_display = ['ip', 'name', 'slice', 'flavor', 'image', 'key', 'node', 'deploymentNetwork']
 
+
+class UserCreationForm(forms.ModelForm):
+    """A form for creating new users. Includes all the required
+    fields, plus a repeated password."""
+    password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
+    password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput)
+
+    class Meta:
+        model = PLUser
+        fields = ('email', 'firstname', 'lastname', 'phone', 'site')
+
+    def clean_password2(self):
+        # Check that the two password entries match
+        password1 = self.cleaned_data.get("password1")
+        password2 = self.cleaned_data.get("password2")
+        if password1 and password2 and password1 != password2:
+            raise forms.ValidationError("Passwords don't match")
+        return password2
+
+    def save(self, commit=True):
+        # Save the provided password in hashed format
+        user = super(UserCreationForm, self).save(commit=False)
+        user.set_password(self.cleaned_data["password1"])
+        if commit:
+            user.save()
+        return user
+
+
+class UserChangeForm(forms.ModelForm):
+    """A form for updating users. Includes all the fields on
+    the user, but replaces the password field with admin's
+    password hash display field.
+    """
+    password = ReadOnlyPasswordHashField()
+
+    class Meta:
+        model = PLUser
+
+    def clean_password(self):
+        # Regardless of what the user provides, return the initial value.
+        # This is done here, rather than on the field, because the
+        # field does not have access to the initial value
+        return self.initial["password"]
+
+
+class PLUserAdmin(UserAdmin):
+    class Meta:
+        app_label = "core"
+
+    # The forms to add and change user instances
+    form = UserChangeForm
+    add_form = UserCreationForm
+
+    # The fields to be used in displaying the User model.
+    # These override the definitions on the base UserAdmin
+    # that reference specific fields on auth.User.
+    list_display = ('email', 'site', 'firstname', 'lastname', 'last_login')
+    list_filter = ('site',)
+    fieldsets = (
+        (None, {'fields': ('email', 'password')}),
+        ('Personal info', {'fields': ('firstname','lastname','phone','site')}),
+        #('Important dates', {'fields': ('last_login',)}),
+    )
+    add_fieldsets = (
+        (None, {
+            'classes': ('wide',),
+            'fields': ('email', 'firstname', 'lastname', 'phone', 'site', 'password1', 'password2')}
+        ),
+    )
+    search_fields = ('email',)
+    ordering = ('email',)
+    filter_horizontal = ()
+
+# Now register the new UserAdmin...
+admin.site.register(PLUser, PLUserAdmin)
+# ... and, since we're not using Django's builtin permissions,
+# unregister the Group model from admin.
+admin.site.unregister(Group)
+
 admin.site.register(Site, SiteAdmin)
 admin.site.register(SitePrivilege)
 admin.site.register(Slice, SliceAdmin)
@@ -156,6 +223,5 @@
 admin.site.register(Flavor)
 admin.site.register(Key, KeyAdmin)
 admin.site.register(Role, RoleAdmin)
-admin.site.register(User, UserAdmin)
 admin.site.register(DeploymentNetwork, DeploymentNetworkAdmin)