I finally got whacked good on a virus (Bagle.J) spoofed from my ISP admin. Rueters and PC World have some press releases out on what is characterized as war between the creators of the NetSky and Bagle virus/worm creators.

Anyways, for all us PC losers, there's no cure yet supposedly, so don't open anything and don't use your preview pane for email.
But if you get it or want some very up to date protection, try this outfit: http://www.pandasoftware.com/download/software/