Ad Bard

I'm looking for beta testers at Ad Bard, an open source advertising network that I'm building using Drupal and the Ad module. The project is current in beta testing, with the current goal being to build a network of websites focused in one way or another on free and open source software. If you're interested in participating, please sign up for a free account, and follow the directions to place the appropriate javascript on your website.

I'm also quite interested in hearing feedback on the idea. What would it take for an advertising network like this to be interesting to you? What features would you like to see? I look forward to any suggestions and/or criticisms.