It doesn't help that both of Datagate's DNS servers are in the same location, so no-one can get to their site.
No-ones been able to contact them, and apparently Nominet have had a lot of complaints.
One of my clients have been trying for ages to move away from them but they wouldn't let him have his own domain. Wish he'd done a Nominet dispute when I told him to, now there's little anyone can do.
Nominet are being helpful. There's Datagate's blog at http://datagate.wordpress.com/ but it's worse than useless. They suggested 15-20 minutes nearly three hours ago.