ja, ist mir auch so ergangen. das war gefühlt die längste downtime, die ich hier auf bitcointalk.org miterlebt habe. gab schon einige user aus dem forum, die schon an das schlimmste gedacht haben, nämlich dass das forum nicht mehr wieder kommt.
theymos hat sich dazu auch schon geäußert und kann leider das problem, welches diese downtime erzwingt, nicht lokalisieren und vermutet dass es durch vielleicht irgendwelche wartungsprozesse beim hostanbieter verursacht wird. zudem sagt er, dass er irgendwann auch den hauptserver aufrüsten möchte - ein wort über die neue forensoftware hat er leider nicht verloren.
It was the same weird thing which caused a few hours of downtime 6-12 months ago, and I think it's what causes the few minutes of downtime people observe every few weeks. I've never been able to figure out what causes it. It looks like the network gets cut between the web server and the database for a while. It seems to always happen at around the same time, so I suppose it's probably some automated maintenance process messing something up, but I don't have anything running at this time, so I wonder if it's something in the web-host's networking infrastructure, or something like that. It's difficult to diagnose, since it happens rarely, and usually when I'm sleeping.
I'm planning on upgrading the main servers sometime in the next few months. (Just as part of standard maintenance: there will be no user-visible changes other than perhaps slightly improved speed.) Maybe that'll fix it just by virtue of moving things to different areas.
(The few minutes of downtime just now was due to me doing something, and is unrelated.)