Since picking up my iPhone three days ago, I've been blown away by the UI and all the applications available for the phone. I've never had a phone that was so easy to use and so powerful at the same time.
My one gripe (and it's a major one) is that applications frequently close up on me at random times for no reason. Texas Hold'Em is unplayable for me due to this glitch - it happens every time I play within minutes of getting started. Ditto with Super Monkey Ball. I was trying to review the latter just now and haven't been able to since the game shuts down within minutes of opening the game. Is this a widespread issue? Are other iPhone 3G users seeing this?