For those of you who like the truly mundane details of my life, I just got a new seatpost for my bike. It took me several months to realize, but my bike frame is actually too small for me. The folks at Chain Reaction pointed out to me that I can get a setback seatpost which will set my back in order. The seatpost I bought is the Thomson Elite, which, while pricey, already seems a whole lot better than the stock seatpost on my bike. It has two screws that let you adjust tilt and front/back separately, and it doesn't look like it's suddenly going to change angles on me when I hit a hard bump.