Android Social Site
From Laen
Tie your phone number to a number of social networking sites. When a friendship is established, you get Twitter, Flickr, MySpace, Facebook, etc.
Hide behind a GrandCentral number for privacy reasons?
Store the amount of time you spend talking to each person, automatically. Good for rebalancing T-Mobile Top5, etc
Use XMPP to exchange data.
Web Games:
- Tag
- Assassin