Ma solution

Je vais vous faire partager mes scripts. J'utilise devilspie1 patché2 que je lance avec mon ~/.Xsession. J'utilise aussi wmctrl3. J'utilise xbindkeys* pour associer la touche menu (remappée grace à xmodmap) pour lancer drop-down-console. Pour desktop-terminal, j'ai choisi de créer un terminal qui n'est pas partagé entre les différents bureaux et que je lance manuellement (avec une icone dans le gnome-panel). On verra si c'est le plus pratique à l'usage :)

Notes:
1 http://www.burtonini.com/blog/computers/devilspie
2 http://bugzilla.gnome.org/show_bug.cgi?id=330067
2 http://bugzilla.gnome.org/attachment.cgi?id=64351&action(...)
3 http://www.sweb.cz/tripie/utils/wmctrl/
* http://hocwp.free.fr/xbindkeys/xbindkeys.fr.html 

fichier ~/.local/desktop-terminal

#! /bin/sh
class="desktop-terminal"
profile="desktop"
gnome-terminal --disable-factory --class="$class" --window-with-profile="$profile" "$@"
exit $?

fichier ~/.devilspie/desktop-terminal.ds

(if
	(is (window_class) "desktop-terminal")
	(begin
		(undecorate)
		;(pin) ;; all workspaces ?
		(skip_pager)
		(skip_tasklist)
;; with this we can't have the nautilus desktop
		(maximize)
		;(above) ;; does nothing
		(wintype "desktop")
;; with that we can have our desktop but the terminal
;; is hidden when we press the button 'show desktop'
		;(below)
		;(maximize_vertically)
		;(geometry "-0+0")
	))

fichier ~/.local/bin/drop-down-terminal (pas parfait du aux limitations de wmctrl et a son incompatibilité avec devilspie)

#! /bin/sh
cmd="1ドル"
[ -n "2ドル" ] && shift 1
class="drop-down-terminal"
profile="drop-down"
hide_desktop=0
shown_file="`dirname "0ドル"`-shown-`whoami`"
debug(){
	echo "$@"
	return $?
}
exists(){
	debug "check $class"
	wmctrl -x -l | grep -q gnome-terminal."$class"
	return $?
}
not_exists(){
	debug "check $class"
	wmctrl -x -l | grep -q gnome-terminal."$class" && return 1 || return 0
}
show(){
	debug "show $class"
	wmctrl -x -R gnome-terminal."$class" -b remove,below
	wmctrl -x -R gnome-terminal."$class" -b remove,shaded,above
	touch "$shown_file"
	return $?
}
hide(){
	debug "hide $class"
	wmctrl -x -r gnome-terminal."$class" -b remove,above
	wmctrl -x -r gnome-terminal."$class" -b add,shaded,below
	wmctrl -x -r gnome-terminal."$class" -t $hide_desktop
	rm -f "$shown_file"
	return $?
}
toggle(){
	debug "toggle $class"
	#wmctrl -x -R gnome-terminal."$class" -b toggle,shaded
	#wmctrl -x -R gnome-terminal."$class" -b toggle,above,below
	if [ -e "$shown_file" ]; then
		hide
	else
		show
	fi
	return $?
}
create(){
	debug "create $class"
	gnome-terminal \
		--class="$class" \
		--window-with-profile="$profile" \
		--disable-factory "$@" &
	res=$?
	
	touch "$shown_file"
	
	while not_exists; do echo -n; done
	#while exists && false || true; do
	#	wmctrl -x -l
	#done
	
	wmctrl -x -R gnome-terminal."$class" -b add,maximized_horz,above
	wmctrl -x -R gnome-terminal."$class" -e 0,0,0,-1,-1
	
	return $res
}
if [ "$cmd" = "show" ]; then
	exists && show || create
	exit $?
elif [ "$cmd" = "hide" ]; then
	hide
	exit $?
elif [ "$cmd" = "toggle" ]; then
	exists && toggle || create
	exit $?
else
	exists && toggle || create
	exit $?
fi