I've been looking over this... http://www.amazon.com/Programming-Customizing-Multicore-Propeller-Microcontroller/dp/0071664505/ref=sr_1_1?ie=UTF8&s=books&qid=1269813698&sr=1-1 Very cool stuff. I'm going to take a stab at a balancing robot, I think. Jack -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist