Review (and import, if good) Debian's jumpnbump_menu using PyGTK+/glade
Sources are available here: http://repo.or.cz/jumpnbump.git/tree/HEAD:/contrib/jumpnbump_menu
I'll double check if there isn't a new version in Debian's or openSUSE's packages.
If it works well, it's probably worth just dropping the non-working Tcl menu (#14 (closed)).