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.
The GPS is part of the 3G options package, so I'd be surprised if it did exist on this one.
$5 says the jack on the bottom right is where the 3G/GPS unit plugs in.