Snarly! You rock!, what a great idea.

Is the script source included? I'd love to take a look and see how the new plugin system works, I'm trying to script something myself.

Just for the sake of getting an idea out there, which complements your great tool, is a "freeze" script, most CG tools I've used have this, which just freezes the selected object and makes it unselectable (some even change the display when doing that).

You would select a figure or body part and hit freeze. Then you could unfreeze figures from a select list.