Just found Yet Another Social Bookmark Tool- BlinkList offers site marking and tagging:
BlinkList is a tool that allows you to create a mental map of the internet of sites that are important to you. It’s a bookmarking manager designed to work in the same way your brain stores data and thinks about things. When we launch the full version in Oct 2005 BlinkList will be the most powerful bookmark manager in existence.
To boldly go where no bookmark manager has gone before! To Infinity and Beyond!
Yup, this makes number 17 of the bookmark sites available on the Make Your Own Multipost Bookmarklet Tool. How many are in your wallet?