I've been sitting on these two dynamo solutions long enough. There is little likelihood I will get around to using them. I basically would need to get a bike to fit these dynamos, and that's not a good enough reason to buy a bike. You should buy a bike because you like the color! DUH!
Dynamo 1. Shimano-Bridgestone-"Tentarushi". I worked with a professor from Japan in Grad School, and had him bring back a economy Shimano generator hub. This is like what comes on all the Japanese commuter bikes. There's one connector on the hub, which tells me the fork is the return path. Japanese urban bikes have a braze-on tab for this, as pictured in the Japanese installation instructions. Includes 36 hole 100mm hub, headlight, wiring. No clamp for mounting the headlamp to the fork. I don't recall what I paid. $25 shipped
Dynamo 2. Sanyo Dynapower. This is the classic state of the art up to the mid 80s. I bought this on ebay a while back, but never got around to using it. This is a lot cooler now, since Compass sells LED bulbs to fit this with a standlight. The dynamo part fits between the chainstays behind the BB. It's got a very slick retract lever so you are frictionless when you aren't using it, like a bottle generator. Includes everything, headlight taillight dynamo wiring mounting hardware instructions packaging. You'll need a bike with longish chainstays without a kickstand plate. It is intended to rach down below the front edge of your rear fender, but you may have to modify your fender in that area. Maybe. $55 shipped (exactly half of what you can get it for on ebay right now).
Pictures in my flickr:
http://www.flickr.com/photos/45758191@N04/sets/72157629348138711/