My favorite iPhone 3G apps

[chadaw]

Facebook App
Labyrinth LE (But I am about finished with the Lite edition) - great free game.
PegJump - free game - But already one it.

I have been trying out:
WhosHere
Twitterrific - but I am not much of a twitter.

[MurphysLaw]

Facebook is pretty good, I still go back and forth between the app and the iphone webpage tho...

Labyrinth is great, I beat the light version and bought the full version. There are plenty of level packs to download. I really like the way the app uses the accelerometers.

Spinner prologue is another cool (free) game that makes use of the accelerometers.

Loopt is cool if you have friends and family with iphones, a buddy of mine recommended it to me and we have fun pinging each other when we're somewhere totally random

The Bank of America app is great if you do your banking with them, I've used the ATM locater a few times and saved some money on ATM fees.