Here's a link to a really cool affiliate ads program I just found today, and I think it's fairly new.
It's called "Affiliate Power Ads."
I added an Affiliate Power Ad to the bottom of my site. Have a look at my home page if you want to see what the ads will look like when you add the tiny strip of code to your pages.
(C'mon, c'mon, look at my little site. I know you want to!)