There are a number of promissing new entries into the electric bike arena. Some DIY, some kits, and some manufacturers. They range all the way up to above $42,000. They market is really ready for multiple solutions and some are getting there. Below are a few very interesting videos and articles bringing light to this very interesting area of solutions that are moving away from the fossil age.
Here is a great website for conversion kits:
The “E-Rocket” from Berlin, Germany…
E-Bike by Volkswagen
electricmotionsystems.com
And for safety you might want to check this out…
2011 Mini Scooter-E electric scooter
2011 Yamaha Electric Scooter
2011 Honda Electric Scooter
The E-Bu Bu Scooter
BMW Concept Scooter… electric version coming soon
2011 Ryno Motors first ride in parking innovative self-balancing one wheel electric scooter
And then there is the UNOCycle…
http://www.popsci.com/cars/article/2009-11/electric-unicycle-transforms-two-wheeler