Well, I finally pulled the metaphorical trigger and bought the hardware for my SAE Prusa Mendel. It's so exciting! I probably overpaid ($73.88 + shipping), but it was nice to get everything all at once from McMaster-Carr (I don't have a hardware store near me that sells the rods or belts). Once I get the hardware (sometime next week) I'll start building the frame.

Things are getting interesting...