They're overquota, which to me means that they got a huge number of hits after Kitchen Nightmares aired. Google's cache shows that the site was still working as of 25 Jan.I tried to check their web site, but it seems to be down at the moment. The show was obviously filmed months ago. Hope things are still ok with them.
If their webhost resets on the first of the month (most do), the site should be available again tomorrow morning.