I get about 20 PMs / day from people asking to help optimize. Just shoot me a PM. I'm going to be busy the next 2-3 days, but I'm sure I'll have some time to look over the site and help you out. Edit: Just saw the link in the sig. Let me take a quick look.
Mines up and down... (all sites put together..) ranging from 5-35% .. it's down a tad my average used to be 10-65%
Why would I be kidding? If you have a good site, and the ads are REALLY RELATED to your topic, it happens.