I used to have a del.icio.us account but many times I had errors in loading the rss feeds, so I decided to make this plugin for this other website which is very good too.
It has two toolbar buttons, "My Bookmarks at BookmarkTracker" and "Add to BookmarkTracker".
You must be logged in, otherwise you will see a login form.
I also included a link in the right click menu to save bookmarks.
Hope some of you like it.