I admit it, I am too curious to pass the opportunity to play with another gadget.
Some link for those that ask themselves “what the hell is an Arduino”.
The projects homepage: www.arduino.cc
Good books on Arduino from O´Reilly:
Ideas for dozens answers the question “Why the Arduino Matters“, and yes, this could be true.
An interesting project is TinkerKit, an Arduino-compatible physical computing prototyping toolkit aimed at design professionals. Still under development, but very interesting.
And finally, O´Reilly has also a book on Arduino in german: