I am terrible at making wallpapers.
However, a good friend thought that last panel from the Curb comic might make a good one, so I sent him the file and he did some dark magic and made this for you! A giant dog wallpaper!
P.S.,
if you have a Mac and like reading digital comics and organizing them, you should check out his app that he made. It does all the things your digimal comics collection tells you it wants: tagging the comics, sorting the comics, pulling down info from ComicVine about the comics, reading the comics for you and telling you the good parts! Everything! Go get it!