I just put up an adsense ad on my site. I'm trying to figure out where I should put more. I just don't want my site to look all cluttered. Any help appreciated www.webpuffs.com
160x600 skycraper underneath the right menu and maybe a 468x60 banner underneath the posts (not on the mainpage, but the article pages). And check the site in IE6, the top menu is a bit strange there (the home, about, contact us). Also, in IE7, the header and footer div are both two pixels wider then the main one. No need to worry about that now, though...
My suggestion is a single 728 leaderboard on top just below your logo, then 336 boxes in the single page templates at the bottom of the posts. Then match the colors of the ads to blend in with your page, i.e. red links like your sidebar.
don't overdo it, wrap adsense around your posts or integrate them in the post. Make sure the adds blend in well.