James Bennett: Users and the Admin
James Bennett has written this great article on adding user controls to your Django admin screens: Only allow users to see and edit their own content, unless they're a superuser.
A great example of what's possible with the 'new' admin - just don't ignore his wise advice: "that’s a problem no amount of technology will solve for you: if you can’t rely on your site administrators to do the right thing, then they shouldn’t be your site administrators. "
http://www.b-list.org/weblog/2008/dec/24/admin/