I'm trying to manage a personal knowledge base using a personal wiki (currently using MoinMoin, before that MediaWiki). Apart from organizing e-books and papers, I would like to be able to save web pages for future reference in my personal wiki. I've researched a little bit, and I found a couple of browser add-ons for more advanced saving of a web page. As an alternative, I knew that a PDF printer driver can be useful as well - print a page instead to a real printer to the PDF driver).
The PDF driver works well, a couple of pages that I used for test look OK, and I plan to upload these web-articles-converted-PDFs in my personal wiki.
Did I miss some other alternative for converting? What do you use in this general problem of keeping web page/articles for future reference?
EDIT: I forgot to mention the requirement for the above to be cross-platform - to be able to save, upload, read and update my article database from Windows, Linux, and Mac OS X computers.