Windows Live Messenger Virus Warning

If you use MS Instant Messenger (windows live messenger) at all be careful not to fall for a bad link which installs a virus.  You will be IM'd something like:

Hey, isn't this YOU??   http://mainmsn.com/images/viewimage.php?=[my email here]

The key is that it actually tries to open or download/run a file that looks like an image but isn't really.  It then (I think) sends out links to your contacts in IM world.  I have gotten one so far, but didn't actually fall for it.   I am putting this in a couple categories to get the info out to some who only subscribe to certain categories feeds.