Well, in what seems to be a continued streak of good luck, it seems that my seized rear shock problem has resolved itself. The shock seized during the day Monday, which was the first day the car had sat outside since the cold front came through. Upon inspection after arriving home from work Monday night, I noticed some frozen water splashed around the top of the wheel well. It seems that combined with the fact that the rubber boot that is supposed to cover the region from the bumpstop down to the top of the shock cartridge/housing has long since disintegrated, the water got into the mechanism and froze. Yesterday morning, after things start warming up again and I had left the 2 60W bulbs on in the garage overnight, I realized in a flash that the rear end was absorbing shock again. Yay.