I've been working on an application using Bootstrap for a couple of weeks now, and eventually dropped all the extra js plugins I was using, except the jQuery UI datepicker (which I style using JQuery UI Bootstrap: http://addyosmani.github.com/jquery-ui-bootstrap/). My menus are entirely Bootstrap based, I don't see what Superfish offers that bootstrap-dropdown.js doesn't offer.
Why not just use Bootstrap and Bootswatch? Annet