Microsoft today revealed that the next generation of Windows mobile phones (website) will allow you to connect to your XBL account and collect achievements while on the go.
pecifically, the Windows Phone 7 Games hub will allow you to:
* Collect Achievements and build your Gamerscore
* View Xbox LIVE leaderboards
* See your Xbox LIVE Avatar
* Access Spotlight feeds, including the latest tips and tricks, game news, updates and more
* Add Xbox LIVE friends to your friends list while out on the go
* Turn-based (asynchronous) multiplayer gaming
Engadget has some pretty good coverage of the Windows Phone 7 Series launch. It looks fairly impressive so far.