Looks like the iPhone is due for release in just over a month in the US and still no-one on the net appears to have gotten hold of one for a decent hands-on preview.  So we're still left with rumour and supposition to tell us what features are available.

The EverythingiPhone site looks like it's compiled everything known about the device (accuracy unknown) and here are a few pearls:
 - uses EDGE but has the ability to upgrade to 3G through a potential future upgrade.
 - Outlook on Windows cannot be synchronised with the device, although MS Exchange IMAP and POP3 mail standards are supported.
 - Apple has not confirmed whether users can customise their own ringtones.
 - The camera is capable of recording video but the current feature set does not support it.

Of course, all of this could change within the next month before release.