Spoke POV is an easy-to-make electronic kit toy that turns your bicycle wheel into a customized display! The project includes a free schematic design, open software for uploading and editing stored bitmap images, and a high-quality kit with all the parts necessary to build your own.
http://www.ladyada.net/make/spokepov/
A little bit improved from Tiny POV project.
http://www.electric-clothing.com/megapov.html
An Inexpensive Persistance of Vision Toy
http://www.ladyada.net/make/minipov/index.html
This project is a second revision of the MiniPOV by Ladyada.
http://www.ladyada.net/make/minipov2/index.html