Right now its 1280x1024. If you would be kind enough to host the wallpaper on your site (so it doesn't chew my bandwidth) I'll re-size it for 1024x768 & 800x600.
Used the pic from you site, my own spray paint art and hand drew and colorized the logo real quick.
http://www.zer0signal.com/PUTS-Wallpaper.jpg