I was pretty excited... until I saw the CPMs. It costs $10.50 CPMs on their education pages. By comparison, $10.50 will get me about 200 clicks on AdWords. (The minimum of $50 a day also means that the "learn the quirks of the site" period would be wildly expensive for me.)

I'd love for somebody to come up with something anywhere close to as good as AdWords for me... but I'm still looking.