Patch those PCs!!
Normally, this should only be on the Geek Speak board, but it's important enough to put somewhere people will see it quickly.
There are apparently active attacks under way.
If you have a PC, and have not applied the latest Microsoft patches (if you have Win2000 or later, check out the Windows Update function) then you might as well be swimming off the Farallon Islands in a pork chop suit.