Its not much as a forum, not so many visitors etc... So I made an ad revenue sharing feature on it, maye it helps I rebuild a lot on this phpBB forum, urls, etc.... The disadvantage of the way that I set up the url structure is that adsense doesn't always understand where the page is about when there is a session id appended. Guests don't have session id, but when you are logged in, adsense at least once thinks that you are from China, so I have alternate adds, now pointing to the sharing thing. This is a bit of a spammy post, but anyway... http://www.vierstra.com/forum/