Back Down Again...
Here's the explanation from Hostmatters:
For those of you scoring at home, or if you're alone, this makes five outages in the last week. Grrr.[NAC] Network issuesThe two servers at NAC are inaccessible at this moment. NAC engineers indicate the problem is network-wide there, and they are working to address it. We, like anyone else with servers there, are awaitig updates from them.
UPDATE: Back up again as of now. See you back at the mothership.