It's two "Sackboys" (androgynous charcaters from LittleBigPlanet - a PS3 game by Media Molecule that's scheduled for release this Autumn, and is going to blow the mind of everyone who plays it!). The red down the right is where the Vista sidebar goes, and I put it in so I could work out the width (150 pixels. A nice safe width, 150px) for when I designed my own wallpaper. There's also a black bar at the bottom behind the start bar (30px high - another nice, safe number). I've been at the "I'm going to design my own wallpaper now" stage for, ooooooh, six months? Seven maybe.

http://i3.photobucket.com/albums/y97.../desktop-1.jpg