If you happen to own the TomTom GO 910 GPS device, you may want to install and/or update your anti-virus software (if you don't already). A "small number" of these devices produced between September and November of 2006 include a small virus. The best way to check if you own the TomTom GO VirusTime Edition is to check the software version. The affected model has version 6.51.
TomTom released a statement saying that the virus is very low-risk and to eliminate it just allow your anti-virus software to do its work. So, who is going to get canned at TomTom this week? That is one hell of a practical joke by some coder, or one hell of a coincidental mistake.