There are new rulings concerning Robot Design...
In the Complete Challenge PDF Document: http://firstlegoleague.org/challenge/2011foodfactor under "robot game - rules, procedures, philosophies and definitions" - 4- Equipment:
You are allowed a maximum of six non-rotation sensors in the competition area. Choose your favorite combination from among the LEGO-manufactured Mindstorms touch sensors, light sensors, color sensors (LEGO RGB color), and ultrasonic sensors.
This is in reference to the NXT Mindstorms, any combination folks, and yes, there are only 4 Input ports on an NXT. Hmm, think creatively folks and it does say "in the competition area." (hint, hint, :-)
For using the RCX:
RCX robots are allowed, with a max of eight sensors from among touch, rotation, and light.
Also, be sure to download the awards descriptions, there is a change in the Awards:
Remember to keep up with the clarification of or new rulings:
LEt's GO Teams!