How do you request a feature?
From Joomla! Documentation
You can request a feature here:
http://forum.joomla.org/index.php/board,38.0.html
or here:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemBrowse&tracker_id=20
You will need to register at joomlacode.org to submit a feature request.