Basic Info
 

Detailed info
 

Website:
http://arduino.cc/
http://getsatisfaction.com/arduino
Company Overview:
What is Arduino?

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 environments.
Products:
http://arduino.cc/
http://www.adafruit.com/
http://www.sparkfun.com/commerce/advanced_search_result.php?keywords=arduino&x=0&y=0