dashLicious it implements a post to your del.icio.us account on the fabulous Web service created by Joshua Schachter.
dashLicious is optimised for all the main browsers (see what's new below) and NetNewsWire users. when you enter into the dashboard dashLicious will automatically populate the url and description fields from either your browser or NetNewsWire (and will allow you to toggle between the two inputs).
And it still has great autocomplete. when you first launch the widget, it connects to your del.icio.us account and retrieves all your tags. then when you start typing in the tag field of the widget, it will make suggestions based on what you are typing. you can navigate these choices by using the arrow up/down keys on your keyboard then press return to select. this should speed up your tagging.