We would be happy to share our experiences with the Jester Drive (Mecanum wheel) including design details and the fabrication process.
We have a pamphlet that explains how the Mecanum wheel works and a paper that outlines the process of molding rollers for the wheel.
Our Design Engineer, Jules Scogna, is working on a "White Paper" that will be made available soon.
Jester Drive proved to be very robust and simple to maintain. We competed at Pittsburgh, Philadelphia and the Championships without having to repair any portion of the dirvetrain. The Mecanum wheel system provides all the maneuverability (and more) of any "crab drive", "swerve steer" or other omni-directional drive system with fewer possible points of failure.
If that's not enough..it is also cool to drive!
If you are interested in the specifics of our implementation of the Mecanum wheel please send me an e-mail or a PM.