I just finshed building a cool project to help us debug our code during Hybrid and teleop mode.
I wanted to be able to record dagnostic data from the RC and I didn't want to use wireless because I thought it would also be helpfull during competitions.
I got a cool serial datalogger from Spark Fun and adapted it to the RC Serial Port 2. It only took a single 4 wire cable and simple code modification... Only a couple of hours work.
If you want to get dynamic driving data from your bot... check out the white paper I just wrote...
http://www.chiefdelphi.com/media/papers/2065
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Phil Malone
Garrett Engineering And Robotics Society (GEARS) founder.
http://www.GEARSinc.org
FRC1629 Mentor, FTC2818 Coach, FTC4240 Mentor, FLL NeXTGEN Mentor