The "Electro-Metro" Project.
Can't afford a Nissan Leaf? No Problem!
Build a cheap electric car yourself by removing the the car engine, replacing it with a forklift motor, and adding batteries.
I have plenty of videos about this project at: http://www.youtube.com/user/BenjaminNelson
The primary "build blog" for this project is at: http://ecomodder.com/forum/showthread.php/ben-nelsons-electro-metro-build-thread-848.html
but watch out! That is a good read for when you have WAY too much time on your hands.
For a good intro to basic electric car construction, stick with this Instructable.
For more in-depth construction information, check out the instructional Video DVD
available at 300MPG.org