I really only know sites that use Google API's like http://www.socialwok.com/ http://www.socialwok.com/ We're working on moving our application over to App Eng

I really only know sites that use Google API's like http://www.socialwok.com/ http://www.socialwok.com/ We're working on moving our application over to App Engine but waiting until they get SSL on your own domain before doing that. You can see the roadmap for it here http://code.google.com/appengine/docs/roadmap.html http://code.google.com/appengine/docs/roadmap.html