lol i have been using blender for 2+ yrs now and still i missed it. so whats the super hotkey to grow and shrink selection in blender 2.56? 
i saw it in use here:-
http://cg.tutsplus.com/tutorials/blender/using-indirect-lighting-in-blender-2-5/
but that guy didnt tell the key. he said as u already know and he didnt knew i did not knew lol. 