Interesting, I hope you are successful.

Random comments, for which I expect no response, and sorry if some have already been mentioned in the 20+ pages:

1. The UI is really slow at the moment, but even worse, the banners are. This is very important :/

2. Do you really need to put a captcha in every form, even if I'm just fiddling with some parameters? If there is a reason at all, if the user misses it the form shouldn't throw away the changes.

3. It would be nice if we could fallback to something not in an IFRAME and reserve some of the display for the site owner's own use.

4. There should be a way to buy banners across the entire network of sites (as well as black list some of them) instead of picking each site individually. Pricing CPM according to the market value of each site would be interesting. Some sort of description or ability to filter by category and a site thumbnail would be great as well.