The domain to movie2k.to has failed to resolve since Tuesday May 28th 2013. We are actively trying to find out the exact reason to this, but it appears that it may have something to do with a German (The site was hosted in Germany) prosecutor issuing a order to raid German pirates a few days before.
It does however seem that the website will be back as Movie4k. For awhile, the domain movie2k.to redirected to the domain movie4k.to. There now seems to be confirmation that it will in fact be the same site as Movie2k.
We will update this post as more information becomes available!
Movie2k is back up on the domain http://www.movie4k.to/. They even have a message about how they feel about policing the internet for copyright infringement. Still no word about exactly what happened.