Latest on their feed is this: "Further details too large for a tweet will be posted on our News page as soon as possible. Again we apologize for any inconveniences the issues we are facing may cause, and promise we're doing our best to scale to keep up with the explosive growth we're seeing." and "LTC and DOGE basemarkets have been temporarily paused in an attempt to ease system congestion while we work through migration and server/network scaling issues."