While this idea (via Antipixel) is rather cool, I think any kind of browser would be much more convenient, and if you need portability use a browser on a PDA. There's no search facility, which to me is a vital function of any documentation. I can never remember whether that property is border-collapse or collapse-borders, and scrolling through a list would drive me insane.
Of course, I wouldn't be using it anyway because I still don't have an iPod. Are they overpriced, or am I just cheap?