I have found Bookmark Buddy to supersede the need for a bookmark bar/organizer in any one browser. It can be used in portable mode so that all your bookmarks can go with you on a key, and work with any browser: http://www.bookmarkbuddy.net/index.php
I've been using it for about 8 years now, and don't even bother storing bookmarks in any of the browsers I use, except for a few links I use daily that get stuck on the personal bar. I'm surprised there are not more products like this on the market, it simplifies a great deal.