This is all over the news today. Here's the site the FBI has set up for those in the U.S. I'm not sure if it works for those in other countries but, if not, just Google 'DNS Changer Virus' for information.
http://www.dcwg.org/?page_id=381
I see that there is info for other countries on that site as well. Oh, how irritating....I put an extra 's' in the topic title!