I’m a big fan of the “del.icio.us”:http://del.icio.us/ bookmark service. I started using it primarily because it enables me to keep bookmarks synchronized, but have come to appreciate the ease with which you can categorise your bookmarks into multiple categories, and enables you to look at the bookmarks of other people have linked o the same sites as you, thereby providing you with a vast amount of other links you might be interested in. The one annoyance is that I have to visit the del.icio.us page to access my bookmarks. At a pinch it would be great if they could offer a view of your bookmarks which could sit in the Firefox sidebar (like “blo.gs”:http:/blo.gs), however even better would be a firefox plugin which would load your bookmarks into Firefox itself.
The beginnings of such a plugin may well be found in the new “Bookmarks Synchronizer”:http://forums.mozillazine.org/viewtopic.php?t=41742. Currently it only supports the import of XBEL format XML, but it should be an easy job to parse and load del.icio.us’s RSS feed of your bookmarks.