Apparently something less than fun happened when we were out of town. This afternoon I walked downstairs and found this:
Yep. Water damage--bad enough to collapse the ceiling (and yeah, it fell on some projects and, since I had recently gone through my college art portfolio, some of my drawings, as well).
So, guess what we'll be fixing up next? At least it will be really easily to improve the lighting (you know, since the ceiling is out of the way and all).
(While prepping for the plumber, we ripped off most of the rest of the ceiling. We are trying to decide how much of a priority it is to put it all back together again!)