Håkon Wium Lie
I'm also the person who came up with the idea of CSS in 1994. From the outset, CSS was designed to describe printed documents and the specifications have gradually been extended to support features like page numbers, footnotes, and running headers/footers.
Prince makes it easy to use these features whenever you need a PDF document, be it for printing or archives. In an interview with Toby Osbourn, I expand on how CSS and Prince came about. I also have a personal home page.
I maintain a set of guides for using Prince to create beautiful PDF documents from HTML and CSS.