Have you ever looked into Visor by Blacktree (Same folks that did Quicksilver)? http://code.google.com/p/blacktree-visor/ http://code.google.com/p/blacktree-vis

Have you ever looked into Visor by Blacktree (Same folks that did Quicksilver)? http://code.google.com/p/blacktree-visor/ http://code.google.com/p/blacktree-visor/ - It allows you to show/hide a terminal with a key combo. Not the exact thing you want, but closer to it then any other plugin/app I know of.