Looks like Technorati had a colo fire that caused problems and headaches for all involved. Though the service was down for the weekend, it should be back Monday. Here’s a brief explanation of what happened as told by David Sifry, the CEO:

At about 9:30PM PST Friday, there was an electrical fire on the power main inside our colocation center, where our entire server infrastructure is housed. This caused our battery backup power supplies to kick in, but the independent power generator at the colo never kicked in - possibly because the problem was a fire inside the building rather than a general power blackout of the neighborhood. Well, the fire was only problem #1. We weren’t expecting or planning for an outage of that kind. It caused a cascade of other problems that made the rest of the weekend a huge PITA. Problem #2 was that we didn’t have a good enough emergency plan in place that would shut our systems down cleanly when power ran out like that. Unfortunately, that meant that when the batteries died, our server farm went down quite ungracefully - causing problem #3, which was data corruption due to the unclean shutdown.

From Sifry’s Alerts