Wish I could remember whether it was it was called "hot spot" or not, but at my company we're looking to change our disaster recovery plans to an offsite location that is pretty much a replication of our office now. All the servers will pretty much sync over night so if anything happens, the network switches over to the offsite one and no one would know the difference. Except us downstairs in the server room going 'wtf is this sh!t?'.
Basically I think there is a highspeed connection, pretty sure fiber, that is dedicated to our servers and keeps everything up to date. Hmm...when I get to work on Monday I'll ask more about this, as I came in to the job a couple months out of the loop, and have had other stuff on my desk to keep me out of the loop as well. But i've been told about it a few times though. I'm hoping to learn more about data backup and recovery by the end of this year.
Looking at the Iron Mountain website, it sounds very similar to what we're doing. The only drawback to all this though is the $$$. From what I've heard it will cost us an arm and a leg, but when we look at it vs. a "lose all" situation, it doesn't matter what the $$$ is.