As exciting as Apple's iPhone is, I'll wait for the second rev, anticipated in May or June for several reasons.
While the iPhone is arguably the best iPod to date (for users that don't need the larger storage of the Classic), it isn't really a great phone -- yet.
The reception is OK, but nowhere near that of top-of-the-line Nokia or Motorola phones. Whenever I see someone with chubby fingers struggling to type on the touch screen, it is painfully apparent how badly the iPhone needs voice dialing.
The mail app doesn't allow deletion of more than one message at a time. A $399 device that touts Google maps, but doesn't have A-GPS is behind the times.
So, in May that's what I want in my iPhone -- a list of improvements that will be more important than the touted upgrade to HSDPA.