The server was down for almost a full day, apparently thanks to a crash which involved a slight bit of filesystem corruption which it couldn't _quite_ recover from on bootup without a human coming in and saying "yes, repair that sector".
I love computers. :)
Huge thanks to Jason Richey, who drove in to the hosting center to beat up on the server in person tonight.
The server is back up; I've locked the wiki while double-checking the database tables for corruption.
Messages to the mailing lists sent in the last day should come through, but some may take a while to get resent from intermediate mail servers.
-- brion vibber (brion @ pobox.com)