The docs haven't been updated yet. Here this years IO video and pdf presentation: http://www.google.com/events/io/2010/sessions/building-real-time-apps-app-eng

The docs haven't been updated yet. Here this years IO video and pdf presentation: http://www.google.com/events/io/2010/sessions/building-real-time-apps-app-engine-feed-api.html http://www.google.com/events/io/2010/sessions/building-real-... and here's the sample app (java): http://code.google.com/p/dance-dance-robot http://code.google.com/p/dance-dance-robot