T-Mobile G1 detailed walkthrough

There have been plenty of pictures about T-Mobile's new G1, but there's less info about on what the software is actually like to use. We nobbled a T-Mobile representative at the launch of the Google phone recently, and he showed us exactly how the whole thing works. See how you can drag and drop icons to make the desktop screen look exactly like you want it to, how to zoom in on web pages, what the keyboard is like to use and when the trackball comes in handy.