In case anyone wanted more information on the disease that spread through World of Warcraft, here's the official BBC article about it:
http://news.bbc.co.uk/2/hi/technology/4272418.stm

And some experts discussing the practicality of modeling disease in a virtual world:
http://news.bbc.co.uk/2/hi/health/6951918.stm.

I'm amused the second one is actually in the "Health" section of BBC, rather than "Technology"...