My friend bought one opening day and I was using it a lot today on the way to/from our summer lacrosse game. It is sweet. There are a few things I dislike (ie EDGE needs to be faster, no video recording, and the touch sensitivity can be quirky (but I also haven't had much practice.) But it's still really nice. It's also boosted Apple stock by $13 in a week.
Anyway, iPhone discussion here.