I'm interested in this idea. It was something I was discussing with a couple of friends a few months back (the banner ad depository). I've since heard that there's a website that publishes the affiliate codes of popular charities, so you can give your affiliate earnings straight to them by putting their codes in your site. I like the idea of a banner download site though, which can help get a message across even when the ad isn't clicked.

You can contact me through my website at www.sean.co.uk.

Sean McManus