Comment 157 for bug 930148

@Ego - just ignore the sad excuses, set the launcher to auto-hide with minimum sensitivity, and install cairo-dock and be done with it. "Dodge Windows" (a misnomer proving this feature is misunderstood - it's the real "auto-hide") with very fine-grained settings (only hide when active window overlaps etc.) will give you what you want, still have [Super] for bringing up Dash.
Some wasted resources, but you don't have to put up with the humbug launcher behaviour.