the pelt unwrapping tool (written in MEL for maya) that a number of
people had drooled over has been GPLed
The author said he'd be willing to offer assistance for someone
porting it to Blender.
See the README.txt in the release
PELTING TOOLS: UV UNWRAPPING FOR MAYA
Copyright (C) 2005-2006 SUNIT PAREKH
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either versión 2
of the License, or (at your option) any later versión.