This is kind of an old story, but a friend told me about it the other day and this is what I
found. It appears that in sony's attempt to guard against piracy, they hired a third party company,
First4Internet, to write a program that would limit the number of times that their cds could be copied and communicate information back to sony.
Here is a list of the infected cds. It appears that virus writers decided to exploit this with a trojan virus. Good job sony. Three cheers for DRM!