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Amerigo: They are "locked" for a reason. AT&T developed the back end to support such things as visual voicemail, etc. I'm sure someone will unlock a iPhone within the week, considering the high profile of the release. People have already figured out how to activate one (just for wifi) using two iPhones. The fact is, even if you were sly enough to unlock one, you would have a phone with no voicemail ability and quite possibly other problems as well.
Dfield: 4 GB is "silly", eh? Try appropriate. In my case, it's perfect. I don't need my whole damn collection of mp3s, movies, etc. on my phone. I'd rather be selective rather than cram everything in there. 4 GB is still big enough for all your email, a few movies, some albums, plenty of photos. I'm sure they will increase capacity, but remember that not everyone needs a 300 Terabyte cell phone anytime soon.