"thanks for sharing Chris, I should have checked HiTechnic's site before making any requests for sensors. It sounds like RoboCup Jr. is starting to enter the multi-robot communication between Lego NXT robots.…"
"I think its about time that someone makes a directional IR communication sensor for lego to enable multi-robot behaviors between NXT robots. The E-puck, R-one, Khepra , and SwarmBot are all consider multi-robot due to this capability. If NXT…"
"Phillips LPC and Texas Instruments offers an even cheaper Cortex M3. I've used the 8962 frrom Texas Instruments with the orcboard.org , I believe MIT & uMich also use these OrcBoards (cortex M3) for their Robot Lab courses."