Any time I'm considering phones, I always compare them on http://www.phonescoop.com first. Of course in this case you have it narrowed down to two platforms, not so much the actual phones. In my mind the iPhone v. Android argument goes something like this... Do I want my smartphone life to be tied to Apple on a closed platform... or Google using an open platform? I already use Google to organize most of my daily life... Google Calendar, Tasks, I've even started fleshing out my Google Contacts. All that information will automatically show up on my Android phone. I'll have to convert everything if I go to iPhone and if I don't like the iPhone or AT&T or if they stop making them for some reason, I have to move everything again. On the other hand, if I get the G1 or the myTouch and don't like T-Mobile... well... by the time my contract is up there will be Android phones on most other carriers. Everything follows me. No hassle. Plus I just plain prefer to support open software. It's why I use Linux and it's why on my 1 Windows box, most all of the software is open source.