Our datacenter had a power-outage including the UPS systems (!). Some things didn't start up properly making other things not starting up properly etc etc.
We are working on it and everything should be back up shortly(-ish). Right now we're waiting for a ~400GB partition on an incredibly slow raid-5 system to run fsck ("/dev/vg1/lv0 has gone 309 days without being checked, check forced.").
Update ~19:40PST: We have almost everything running again. The mailing list server didn't seem to come back after the reboot so no mailing list mail yet. Robert is calling the data center to see if they can put a crash cart on it.