Script Summary: On the page where you pick a bundle to edit, show the unbundled tags so you know what bundle to choose. Also, when you hover over an unbundled tag, show most recent link that has that tag.
Updated Jan 8, 2011 to make the unbundled tags clear the now-floating bundle list.
Preview:
A light version of this script that omits the hover behaviour and just shows the list of tags is also available: Delicious.com - Show Unbundled Lite.
