Symantec just issued a new Category 3 Virus alert. The name of the virus is W32.Novarg.A@mm and while the information on it is a little thin, you can read about it here:

Category 3 - Moderate
Threat type characterized either as highly wild (but reasonably harmless and containable) or potentially dangerous (and uncontainable) if released into the wild.

Symantec just upgraded this to a Category 4 Alert.

Category 4 - Severe
Dangerous threat type, difficult to contain. The latest virus definitions should be downloaded immediately and deployed.