MyDoom.O is out. This virus is a mass mailing virus that masquerades as a Mail Bounce or Delivery Failure message. It typically delivers itself wrapped in a folder, in a zip file all with the same name (to try to trick virus scanners suing an illegal path). Be very wary of opening zip'ed email attachments without saving them down first, then unzipping, then going in to the folder and looking at what it is..if you open from your zip program (default action) you may inadvertantly open the file.
Here is a bonehead who made a buch of stupid little Visual Basic games with trojan horse viruses. I reported them to Symantec but it appears they don't care. http://salikgames.home.att.net The webmaster must really not like Joshua Salik.