I'm part of a UC Berkeley team developing a new advertising platform for social networks. We're about ready to stealth-launch, and I was hoping I could find a few people who ran online stores who wanted to try it (at no cost). This involves installing a small link (dynamically generated according to our API spec) on your storefront that opens a new window. In other words, it's very easy to do. I know I'm being vague, but when you see what we're working on, it will become much clearer. Post here if you're interested, and I'll send a PM.