WorldBrain's Memex: Bookmarking for the power users of the web
This is still not as powerful as my one, simple trick to handle all bookmarks, ever: Print to PDF.I've been doing it since last century, and I have 10's of thousands of PDF's of every single web page I've ever found interesting, sitting right there in a directory on my computer.  Its indexable, searchable, grok'able, available off-line, allows me to harvest data without fuss, and gives me access to anything I can remember about the article, almost instantaneously.    $ ls -l ~/PDFArchive/ | grep -i "bookmark" | grep -i "manage" | wc -l 

= I've seen 20 other bookmark management 'solution' articles in 20 years.. nothing beats print-to-PDF.  Its just awesome.