iPhones are great! They are like the iPod touch, but a little bigger and a lot better because you have an iPod, a phone, and games all in one! You can do whatever you want on it, listen to music,...
I prefer the iPhone 3GS. Primarily because it receives signal better and i find it's easier to hold but that's just me. Plus i like the variety of cases you can get for the 3GS which makes it much...