MySpace.com is serving up the "Antivirus360" virus to unsuspecting users computers automatically.  It has something to do with the images pages- probably the uploading section.  After browsing to this page, you will get a popup for Antivirus360 and you have to hit "OK" or "Cancel".  Don't click anything- pull the power immediately.  This virus hides itself in system restore, and hijacks Internet Explorer rendering the computer mostly useless.  It will allow you to browse to a website that is selling the fix for it- $30 up front, and then another $50 to really get rid of it.

When attempting to submit a complaint to MySpace, their web site kept giving me page errors and would not allow me to formally submit a complaint.

I hope this reaches as many people as possible before it's too late- just stay off of the uploading pictures section until they can figure this out and get rid of it.  I have not had any luck in removing this virus from a friend's computer- it is a big pain in the butt.