I got a new virus sent to my work address today, and its pretty convincing too. It basically says that your site is broken when viewed with the Mozilla browser. The email has an attachment with what is supposed to be a screen shot, but isnt, its a back door virus!
See this for more info: http://www.viruslist.com/en/weblog?weblogid=162294532
These virus writers are getting sneaky, so dont get caught!