I love my iphone 4! had it since the first day it came out!
need for speed its kinda cool but i really dont play racing games as much. if you belong to some different forums they might have an app like F150forum.com for instance has one that i belong too.
Pandora radio is hands down the best app ever! Photo shop express is kinda cool and photobucket.
Just gotta try different apps and see whats works!
also make sure you have a case!