The hosting crew at mediatemple.net (mt) called today to tell me they've moved our database to a special diagnostic server so they can closely monitor what's going on and fix it. So do your usual thing and be sure to report any weirdnesses to me (via email, or PM, or post to this thread) so I can pass it along to their staff.
I'm really glad they're making an effort to isolate these issues. I've found (mt) to be a very good hosting company. These recent problems are indeed unusual, and I trust they will get to the bottom of them.