Well, I made a wallpaper in AIT class. Only got the one size though. Eh, I'm sure it'll fit. It's optimized for Macs.
If someone can link me to the original wallpaper makers (the one that's inside of the text) page, I'll give them credit for the inside bit. Because I found it through Google Images and I have no idea who's it actually is D: But I dunno, I hope they don't mind me using it ^_^