How much electricity can you generate? Just thinking off the top of my head, I'm a sucky cyclist so can only manage about 150W power output sustained, probably. I'm not sure I could handle more than an hour of stationary biking before I collapse in a puddle of sweat ;-) So that's about 150 WH...
Is that about right (ballpark), or have I missed something? It would probably power my laptop for the day, anyway... It's something to think about (since I love cycling, even stationary ;-) )