GaryK - 6:51 pm on Nov 26, 2009 (gmt 0)
Change your DNS to OpenDNS
I thought OpenDNS was one of the worst offenders. Even when I'm logged-in to my OpenDNS account and I enter a non-existent domain name they show me a page of sponsored links.
Imagine your TV cable operator hijacking the empty channels to put some of their stuff. Pure craziness.
Mine does exactly that!