: Those omni-wheels look very similar to the ones that Ed Sparks posted on his site.
They look (almost?) identical to me. We got our's from McMaster-Carr under the name
Acetal Multidirectional Dual Skate Wheel.
: yoiur drivetrain/swerve wheels seem a little large
We're approximately 36" x 25" in terms of drivetrain, so no problems there.
: not bad at all for a second year team.
As Andy Baker said, we begrudgingly took a new number in order to ensure the team's continuation as an officially sponsored part of Michigan Tech.
I myself am in my 6th year in FIRST. 1998 - 2000 on team 68 as a student, 2001 on 221 and 02-?? on team 857 as an engineer/college student (as all of our 'engineers' are college students).
The video of our protoype kiwi drivetrain can be found
here.
: what exactly do you mean by "swivel"?
The "swivel" is the 90 degrees of rotation in either direction of the drive wheels, allowing side-to-side motion. This will (hopefully) be done by some fancy, yet simple software or even hardware (if I remember my digital signal processing).
*Edited to fix typo.
Adam