One of my former students, Andrew Trusty, has created an online quiz game called Click 4 Obama. For each question about American history and government you answer correctly, the site donates 500 pixels of online banner ads to Obama, which they buy on the web.

If you think it sounds like Free Rice, you're right, it's identical. In fact, it even looks identical, a concern I expressed to Trusty when he showed me a prototype. But perhaps I'm wrong and the online quiz donation game is now a genre with a standard look and feel.

Update: there's also a Facebook app.