According to their twitter they started getting "intermittent errors" (that seems to be tumblr staff for "the entire site is down" to be perf honest) and then they took the whole thing offline because of a "network issue."
12/12/12 The day Tumblr fell. Thousands of people are without anything to do. They refresh the Tumblr page constantly, hoping that it'll come back. But it never does. Never.
Seems like it should be up again in like an hour or two. And then when it comes back up everyone will complain because the dash will be two shades darker.
The darker the better. All the better to match my heart. I would have said soul but I'm convinced I don't have one.
You put coffee or other hot liquids in it to stay warm 8D You don't go on Tumblr, do you? EVERYTHING is something to worry about there.