There are over 300,000 machines infected with the Blackworm worm (aka Kama Sutra, Nyxem, etc.).
The fun is supposed to start February 3rd. However, F-Secure reports:
The destructive deadline of the Nyxem.E worm is based on the clock of the infected machine. So if you’re infected and your clock is not set right, things could start to happen at any time – even though the official activation time is the 3rd of the month. We’ve already received first reports from users who’ve had files on their system overwritten by the worm.