Personally I prefer the website because I can normally remember which chapter something is in, and then I can find-in-page to quickly jump to what I was thinking about.

Aah yes the old "write a book to help one remember how to do it" trick. My technical output spans a book and various places on the web. The number of times I go googling for a solution, to find an interesting text ... then I wonder who wrote it, look at the author and discover it was me. It makes me laugh and cry at the same time :)