Is there any work currently being done on making Inkscape themeable like other Gnome/GTK apps? There's mention of this on "http://inkscape.org/cgi-bin/wiki.pl?GtkMMification":
As part of doing the migration to gtkmm you should try and get icon theming working properly. While not directly related to the port I think fixing it when redoing the GUI anyway is a good time. There are a couple of things to keep in mind. For icon shared by Inkscape with all GTK+ and GNOME apps (file new, file open) etc. you should just use the standard icons. Look at gedit for sample code of how it is done. For icons that Inkscape shares with other drawing apps like The Gimp you should adopt the stock icons defined by The Gimp (floodfill is a good example here).
For the remaining icons you would need to define them yourself, good thing here would be to make sure Sodipodi could use the same stock icons definitions so that when someone icon themes Sodipodi or Inkscape both apps picks up the correct icons. -- Uraeus