Want porn? Subscribe to Google Video email group

Actually, it's not porn, it's a worm.  Google accidentally sent out the Kama Sutra worm to all 50,000 subscribers of the group -- it masquerades as pornography to lure victims into executing it.

"W32/Kasper.A@mm is better known as the Kama Sutra worm. Discovered in January, it deletes files and registry keys on affected systems. It is blocked by most antivirus software." -- CIO

Nevertheless, it was an excellent opportunity for Google to advertise a free virus scanner included in the Google Pack.