I know the Sony Xperia X10 is supposed to come out in the next month or two at ATT. Its a Andriod phone, but only runs ver 1.6 out of the box. They are supposed to upgrade it at the end of the year. Looks like a decent alternative to an IPhone that has decent, but not great reviews. Sony Xperia X10 review
Ease of use I think that is debatable. If you are a google/gmail user though, Android's integration is great. But yeah, for all the things Pun is looking for Android or iOS is really the way to go.
I have an unlocked iphone with tmobile service right now. I'm switching to AT&T when my contract expires in August!