This one is not a hoax.
Be careful with this one, it will drop your network.
http://www.zdnet.com/eweek/stories/general/0,11011,2706523,00.html
http://www.theregister.co.uk/content/4/18239.html
and a discussion at (with a few slightly irreverant comments)
http://arstechnica.infopop.net/OpenTopic/page?q=Y&a=tpc&s=50009562&f=4690928
36&m=1770922111
The fact that beta software has no business being on a production network
seems to have missed the folks at xerox.