fancy bike wheel light

i just found this link on frostyplace.com... wheel lights that spell out messages! is that cool or what?

http://www.heyshopping.com/products_detail.asp?products_id=6520

One of the settings displays your current speed...

OK, I did some searching, and here's a Japanese site:

http://www.digitalcowboy.jp/products/lex/

And a U.S. seller calls them "Hokey Spokes":

http://www.hokeyspokes.com/