Hi. I have had a real hard time tonight finding detailed info on the Arduino NG - input voltage range etc. The expected source: http://www.arduino.cc/en/Main/Hardware led to http://www.arduino.cc/en/Main/Boards which lists the NG, but does not link to more info. The Decimilia links to a lot of helpful extra info.
After much searching, I found an NG spec page: http://www.arduino.cc/playground/Learning/ArduinoSpecs It is a bit sparse, but it told me what I needed to know. (But can handle up to 35V input? Really?). I would like to add that as a 'more' link in http://www.arduino.cc/en/Main/Boards but I don't have privilidges to.
It would also be nice if the spec page summarised some of the 'nuances' of the NG - the problems with using ecternal power (and the relevant fixes), and the auto-reset upgrade. I'll see what I can do about that.