As of now, there are still 200,000+ computers that are infected and will lose Internet access monday if they don't fix the issue.
Go to this site: http://www.dns-ok.us/
If a green background comes up, the particular computer you're using is NOT infected with the DNS Changer virus. It would be a good idea to test this on all the PCs you use.
If a red background comes up, you're infected and Monday (July 9th) you're going to lose Internet access. To fix, run one of these tools:
Norton Power Eraser
Trend Micro House Call
Background on this virus: http://www.dcwg.org/