It would be useful to have some sort of "handle" to drag out of the File Chooser
when dong a Save or Save As action.

When I work with an app that creates files I usually already have the
destination directory open in a Spatial Nautilus window somewhere in the
background; it would really be simpler for me to write the name (if necessary)
and then drag the "handle" to the directory, rather than work my way
(clickety-clickety-click) to the destination directory again :-)

This functionality is pretty much the same as that described in the Rox
filer/desktop specifications:
http://rox.sourceforge.net/phpwiki/index.php/HintsAndTips

I guess the drag-save handle could be a small icon next to the file name, with a
suitable tooltip such as "drag this handle to the destination to save", to add
discoverability to a function that while useful would be largely a question of
habit.

I don't have the skill or knowledge to know if it is really difficult to do or
not, but I hope this coud be added without much effort.

Thanks, 
Renato Ramonda