I want to use this as a form of viral marketing. So I am gonna have some gaming wallpapers with a watermarked name of my site at the bottom but would like to put a html link to the site on it. Also what is the best way to do this. Thanks!
Nope.. this is not possible because the desktop wallpapers are images (jpg...gif etc.) ... And they normally have not functionality... Its a good idea but unfortunately not a possibility at the moment on most computers...
Jim's right. The best you can do is to put some plain text down at the bottom of the wallpaper to tell people where your site is at (think a plain text link, but without the "link" itself).