When the site was down all last night, the mailing
lists were as well.
Are they being run on the same server or group of servers? If so,
you might want to consider some separation there.
Yes, but... it's sort of a big job, and I'm not sure when I'll get the time.
The downtime was caused by, well, I'm still studying it. The machine
was not down. But the network driver was freaked out. I suspect some
kind of script kiddie exploiting something or other. The same thing
happened to another one of my servers a couple of weeks ago.