Hi .. I was wondering how far the capabilities go wich one gets in order to block out or specificly choose adsense adds wich appear on your site ... Gdev
Which ads will be shown on your site depends only on the content of the site. You can filter some competitive ads. I think up to 200 (not sure) You can find more info about filtering competitive ads here. http://www.google.com/support/adsense/bin/static.py?page=adfilter.html