virus alert, not a hoax

Flash Report:
SANS Internet Storm Center has found that more than 500,000 personal computers have been infected by the 'Grew' worm (it goes by a number of different names, e.g. 'Nyxem'). On February 3rd, it will delete all documents (Word, Excel and a number of others). Make sure your mom and your kids (and everyone else who may call you when they lose data) to update their AV signatures and run a full scan. "Update now or all your files may get lost." A special Storm Center website on the problem:
http://isc.sans.org/blackworm