These cool shoes have an integrated Gameboy Color system that clicks in and out of the shoe and is totally functional. The shoes have become increasingly popular in Japan but I don't hink we'll see them anytime soon in the U.S. There are several different types that are available and showcased over at syberpunk.com. Check them out through the link below the picture.
UPDATE: Apparently the shoes were designed by shoe designer, Helen Red Richards. The shoes have been exhibited since the end of 2000 in some U.K. art galleries. The shoes are available to order through Nintendo only but I'm not sure how to order them. SOURCE