taxonomy

I think it's time taxonomy module got some more love in core. Drag and drop etc. was nice to get in D6, but there's much more we could do. Also I keep seeing various taxonomy administration helper modules cropping up - which is good, but there's no core patches cropping up alongside them, which is a shame, so I'm starting this in the hope of generating some discussion about things we could do this release cycle.

There's three obvious areas where Taxonomy could use some help.

Administration:

Merging terms.
Moving terms between vocabularies.
Mass operations (delete, edit).