The servers are hosted by Internap in their Somerville, MA data center.
Not just Turbine, but ALL customers using that data center were affected. Akliz Hosting tweeted about the problem. I'm guessing that some heads may have rolled this morning in Somerville.
I hope Turbine's contract has a nice penalty clause sufficient to fund development of a tasty raid in the next content update.
Cener, Ingo, Rilibald, Hesred, Halras, Loringo
Arkenstone (ex-Elendilmir) - The Osgiliath Guard