I made this for my desktop. It was supposed to look like Fred drew it himself, but it doesn't have the necessary transparency. I'm figuring out how to fix that, and I still work on this once in a while. I think it captures the primary Megatokyo characters (other than Yuki, who just wouldn't fit) in characteristic poses.
All the art is taken from the online webcomic panels. Bonus points for figuring out which panels it all came from; mega-bonus for suggesting a better panel! Available in jpg and png formats.
Actually, that was too tough; I couldn't get all the characters in, so I decided to make a series of backgrounds. Here you can get all the Megatokyo girls, in jpg format or in png format.