Shimano Nexus Generator Hub
I started reading Sheldon Brown's site about generator hubs. I've done a bit of wheel building, so the prospect of replacing my front hub or a new wheel doesn't intimidate me.
My bike setup is a Kona Dew (hybrid) which has 700c Velocity Deep V rims on 160mm disc brake shimano hubs. I see there's a nexus dyno with centerlock disc mount - which is what I'd want.
Some newbie dyno hub questions:
1) how do I decide on light options? 1, or 1+secondary? Schmidt, Lumotec?
2) what practical impact does a dyno hub have for normal bike riding?
3) can the power generated be used for other things, such as recharging USB devices or cell phones?
I'd be willing to spend $150-200 for hub/lights plus the cost of new spokes (I'm sure the hub flanges are bigger, so this is an excuse to get some nice DB spokes).