ThatsBoBo - 6:15 pm on Apr 25, 2011 (gmt 0)
I just heard from Google.
They are telling me no ads above the fold and also be sure to have no ads below the fold or near navigation. Do not have pictures or anything that draws attention near an ad. Do not have many ads. The more ads you have the less you will rank in results.
You can place the maximum number of ads on each page, but you may lose rankings because of it. But don't have less than three ads on each page or you're losing out on revenue.
You should not use the same colors for ads as the rest of your site, but you should blend.
If you use no ads, you will rank #1. Each additional ad you add will = a loss in ranking.