Take out the datasheet and code to it.That would be an appropriate answer for other sites such as avrfreaks. A large part of the intended audience for the Arduino consists of non technical types who depend upon folks like you and me to create the libraries that they use.
[Edit]: Speaking of avrfreaks (http://www.avrfreaks.net/index.php?name=PNphpBB2&file=index
), a lot has changed there over the past few months. They have become more aware of the Arduino and especially of it's non-technical user base. They seem to be a lot more receptive to questions asked by the Arduino community than they were just a short while back.