Apparently some Greek hackers, GST, have "attacked" the CERN site.
http://www.telegraph.co.uk/earth/main.jhtml?view=DETAILS&grid=&xml=/earth/2008/09/12/scicern212.xml
Idiots! Don't they have anything better to do?
The detectors have to be linked to the internet, because that is how they distribute all the data that they collect, so that it can be analysed by computers all over the world. I think it is only the detectors that are connected, the rest of the system is all on its own.
Deary me 
. It apparently is going to generate 15 PETAbytes of dataI expect the huge server room is just to help distribute the data. It apparently is going to generate 15 PETAbytes of data
http://public.web.cern.ch/public/en/LHC/Computing-en.html

just found this interesting and informative site that keeps an up to date status of the hadron collider at all times
HASTHELARGEHADRONCOLLIDERDESTROYEDTHEWORLDYET.COM

ah ha ha ha, what a nut job
Hmm.. Most expensive piece of machinery ever built? I doubt it..