Weblog Database

I launched my forum just over 5 months ago (www.newmusictalk.com). I get consistent traffic anywhere of 20,000 to 30,000 pageviews and around 2,000 uniques. I was considering adding adsense to my forum and I am just looking for some advice from the community on:

1. Ad placement on the page. What has worked best for you.

2. Units per page. Is it worth doubling or even tripling up?

3. Revenue expectations given my traffic.



Thanks for the help.