Camera: I have a great camera, for snaps the iPhone camera is fine, and easy to use.
3G: I'd prefer it but for me it's only email so I'll manage with gprs for now
Third party apps: there are LOADS of them already, APTAPP puts them straight on your phone and the few that aren't already on APTAPP can be ftp'd in
MAC OSX is gagging for it so it won't be long before even more stuff gets released
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