Becca, building your own generator/converter/recharger places you highly in Geekland! Do you still have to recharge at night or does the on-board recharger make a significant difference? A few more questions if you don't mind:
1. How did you make the turn flasher circuit? Do you have only LEDs on the circuit?
2. What kind of switch are you using for the brake light? I have thought about buying one of the cheap Nashbar brake light sets and just using the switch with my own lights, just wondering if I might burn the switch out if I run 12 volts through it.

Any, great setup and thanks for sharing!!