According to a tweet from shady-guy (https://twitter.com/Shady__Guy/statu...00736790364160)
"#cinemageddonSorry guys due to the DDOS attacks and the staff Dox's we've been forced to close."
The account that this was tweeted from was only created today, so I can't confirm it as genuine, but both cinemageddon and tv-vault are currently down, and considering that DDoS attacks have been happening consistently for a few weeks now, there's a good chance this is genuine.
UPDATE: