Our ex server provider Burst.net (where we stopped taking new servers some time ago and will never back to them because of poor network), is having some serious problems with their network. We cannot reach Server13, and email server is also down.
We contacted Burst.net and they confirmed that they are actively working in resolving this problem.
Here is also a link with a discussion about this Burst.net outage:
http://www.webhostingtalk.com/showthread.php?t=731290
Server13 and email server will be back soon.