I'm interested in omnidirectional wheels from when I watched Prototype This!, The Discovery Channel TV series. They used these wheels in episode Six-Legged All Terrain Vehicle.

I thought a few times about building a RC car with these omni wheels, but never got around to even buy needed materials. And of course there is also a lack of tutorials/articles about it on the Internet.

Well, I then forgot about it, but a few days ago I found a post about Omni-car on Hack a Day blog. http://hackaday.com/2009/11/17/omni-car/

Really interesting project, but sadly these wheels are a bit too expensive.

Direct link: http://didyoumakethat.webs.com/projects.htm