Comment 2 for bug 170466

Alan Horkan sent mail (to inkscape-devel and Endre Nagy;
Tue, 23 Nov 2004 16:42:33 +0000) relevant to this.

One possible implementation of the idea would be something
like say roundhole or dropshadow in the share/extensions
directory. Note that this extensions functionality won't be
in 0.40, but might be in CVS relatively soon after 0.40.
Inkscape would provide a menu of such extensions; selecting
one would invoke an external program that could allow
editing the attribute values and feeding inkscape with the
updated SVG.

Ted is the person to hassle^Wspeak to on jabber
(http://www.inkscape.org/discussion.php) if you're
interested in this approach.