[SaintDog]

1). As you expand your content, the ads will display more relavent ads for you, however you will need more content such as new threads, posts and other such items. Forum titles, names and so forth won't give you too much .

2). Place the ads in targetted areas where content is dominate. I've found that placing an ad on the left side of the page (i.e. left column) works and provides targetted ads. The leaderboard works just as well, give there is enough content to spider. It's all in the placement. Don't place ads where there's little to no content else AdSense will fill it with the standard ads.