Someone on this list is infected with a virus/worm. I know this because the virus sent the message to the email address I have set up specifically for this mailing list.
If you have a cable modem and your isp is Rogers Communications, you should scan your system. If you don't currently have an antivirus program, or you are unsure of your AVS update status, you can visit http://housecall.symantec.com for a free, online (java) virus scan.