Symantec's Security Response is also a GREAT place to look to see if viruses are real or a hoax. Here's the link:
For those less savvy, Symantec are the makers of Norton Antivirus, and are considered by most to be the authorities in virus protection.
They also commonly have free fixes on their sites for some of the nastier viruses such as MyDoom and Blaster32, completely free. Good site to keep bookmarked.