Rael Dornfest and others are talking mobile hacks. There was lots of fun things, but here's a few killer cell phone apps I didn't want to lose track of:

• Opera - a real browser for your phone.
• Agile Messenger - a better IM client for your phone.
• miniGPS - location-based alerts and messeging for your phone.

For more info, you might try MobileWhack or Howard Forums.