Then you might like the app I made that maps the events your friends have been invited to:

http://apps.facebook.com/sortonsevents

Which is tied in with a page tab app I'm working on that watches a list of other pages for events they've created or posted:

http://www.facebook.com/UCDEvents/app_123069381111681

Most of the work for that being on the admin end:

http://imgur.com/f1BuKYA

And I've just started the android client.

I'm using GWT on App Engine and trying to keep generic Facebook stuff in a separate project, which will some day be amazing:

https://github.com/BrianHenryIE/GwtFBplus/