Tinker.it

saw Alexandra Deschamps-Sonsino speaker at handheld learning today she is part of
http://tinker.it/

projects they are involved with are like

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environment.

http://www.arduino.cc/