At some point I gave up on del.icio.us (when Yahoo bought them they went downhill, in my opinion). I chose this service instead — it did an excellent job of syncing bookmarks between home and work. And now this service is shutting down starting January next year. http://www.xmarks.com/about/shutdown
It was one of those extensions I would install in Firefox first of all. Too bad. I’ll have to migrate somewhere.