In Apple's gallery pictures, the phone has five-pointed Torx-like screws visible. Nice that they went with something a bit more standard on the production model.
Quote from thecreative:
Unless T-Mobile is now offering micro-SIM cards. AT&T still has the exclusive on this Apple device.
That and their 3G frequencies are incompatible.
$5 says the jack on the bottom right is where the 3G/GPS unit plugs in.
The GPS is part of the 3G options package, so I'd be surprised if it did exist on this one.