Great site, I spent about 30 mins there before i posted this
The ads are nicely integrated to the point where it looks like part of your site. That can be good design wise, but I have found makeing them stand out with a different color scheme results in higher click through rates. You have to decide...nicer design or more money
Well here is a short and sweet story of what happend. I had them blended ok and they did decent CTR, I changed the color up to a red border and my CTR dropped. So now I went to ultra blend. hehe
I like it all the way around. Looks good, integrated well, and a great idea and implementation. I too spent some time there, while only planning on looking at the ads themselves.
I like it a lot. I have recently been developing a forum as well, and I understand what you are going through. You want to optimize your profits as much as possible, but not at the expense of your members. Good luck!