[development] How to move taxonomy fields from the categories fieldset?

I found an old thread where this was asked about but it didn't seem to have a resolution: http://lists.drupal.org/archives/development/ 2006-03/msg00511.html Basically, I'd like the ability to take the stuff in the "categories" fieldset (specifically, free-tagging vocabs, but any and all is good), assign it some arbitrarily weight, and place it elsewhere in the form. Anyone have any pearls of wisdom? I hereby volunteer to write up a nice little tutorial about it for the handbook if someone can throw me some sample code. Thanks a lot, -Angie