When I visited their website just now this is what I got. Maybe someone's treating them to a DOS attack?
Service Temporarily Unavailable The server is temporarily unable to service your request due to maintenance downtime or capacity problems.
Due to heavy load on the server, connections may be temporarily blocked from locations that fetch an unusually high number of pages.
If you've just been heavily browsing, go get a cup of coffee and come back and try again later. :)
We apologize for the inconvenience.