As part of Burning Man, one always rides their bike around the playa. This year a group of us are going to get lights for our bikes to make them more visable. While researching, we came across the following kit, that lets you upload your own images into the lightbar, and if desired add animation to the image. As you can see above. Each of these kits runs about $40 a tire, and to get fluid graphics at slower speeds you actually need 2-3 bars. So it starts to add up quickly. But the idea of soldering this all together and making it work just sounds cool!

http://www.adafruit.com/index.php?main_page=product_info&products_id=5

Graphics for the SpokePOV

http://www.blackbirdsf.org/chainwheels/
http://www.ladyada.net/forums/viewtopic.php?t=687

The ones others are buying are

http://www.hokeyspokes.com/indexusa.htm

Available only in blue... but only $9.99 each.

http://www.myvirtualzone.com/detail.aspx?ID=13680&OVRAW=hokey%20spokes&OVKEY=hokey%20spoke&OVMTC=standard