I was looking for a way to group fields within the admin today and came across this wiki entry which does just that http://wiki.processwire.com/index.php/Template_Tabs
IE have fields nested under certain categories when editing a page such as
General Content (heading/category)
Summary (nested field)
Body (nested field)
Featured Content (heading/category)
Homepage images (nested field)
Homepage summary (nested field)
I was wondering if there were plans to make this a little more straightforward and perhaps use Categories or Tags.
We already use Tags to group fields on the main fields (admin >setup >fields) and could this be extended slightly?