One of those small tasks was taking all my bookmarks, organizing them into better categories and exporting/importing them into the three browsers I use. While doing that I ran across this wonderful tool from Julian Bez that had completely slipped my mind.
"The powerful del.icio.us loader loads your Firefox bookmarks directly into your del.icio.us account!"
Give it a try. Do not load more than 40 bookmarks at a time - oh, and have some patience.