I don't want to get all weepy here, but I do want to say that the WPMU community is tops. This whole process was stressful, and at times I felt like screaming.
And I'd like to extend a special shoutout to IdaWebCo for his wonderful assistance here. It looks like the beginning a a beautiful citizen-journalist relationship.
And Kudos to my member bloggers, who have been pretty much without blogs (on and off) for a week or so. They were very patient and didn't yell and scream.
Some advice for others in similar situations: Be as transparent as possible with your members/bloggers/readers.