We just signed up with clixGalore to offer an affiliate program--15.5% on anything you sell through them, through us. And for those who want less money and less hassle, we've put a couple of banners for easy copy-pasting off the site; all the information you should need is here: Sell GUD! Feel GUD!
If there's not a banner size you like on the site or at clixGalore, just holler. I can make something to fit just about anything, and have several others made; I just don't want to overwhelm.