just so you lot know, theres a nasty new windows exploit going around
information from digg.com
information from sans
information from fsecure
basically, dont touch any .wmf file, or folder containing them with a bargepole.
and for the love of god DONT USE INTERNET EXPLORER , it infects you instantly.
Firefox and Opera both will still infect you, but they ask you if you really want to open it first, and in what
windows picture and fax viewer is what is vulnerable, or rather a componant of it which reads the file metadata from what i can gather
you can still get infected if you download it using a dos box and wget also, if you have something like google desktop which will notice it, and cache the file ( and in the process read the metadata which triggers this )
theres a video here if you want to watch it infect a (deliberately set up) machine, and turn into a rather slick scam.