Anyone for BANners

There have been Firefox extensions for ages now that block ads, here's a nice new one, TidyRead to help you read more easily.
More than just an banner ad stripper, it does a little bit more and tries to give you a completely clean page to read - useful for reading blogs and longer articles, which on some sites can get lost amongst the banners, google ads and site promotions.

I wonder how much these ad blockers affect the actual number of banners viewed vs. the number of banners served.

http://www.readwriteweb.com/archives/tidyread_deals_blow_to_display_ads.php