[WillAdams]

That sort of thing makes me wonder if Inkscape shouldn't have a configurable "Post-processor" option like to that used for G-code, possibly on a per-file basis (add the editing commands needed after saving to a user-editable pane).

[UncleEntity]

From what I understand of Inkscape's (somewhat dodgy) extensions protocol that shouldn't be too hard with a little xml processing magic.

--edit--

Looking at the linked page that would be super trivial to implement.