I agree - that is a fantastic tutorial for a fantastic bit of kit.

I got an Arduino board for Christmas last year, and I have to say that the little blighter has to be one of the friendliest ways for software people to take their tinkering in to the physical world... although, that said, I just can't shake the nagging feeling that one day, for whatever reason, I'll just have to implement Forth on it. Oh, I am so very, very weak.