i guess that's why there's an option in maya to have everything in history treated as either an action or as a tool... but according to the hotkeys g is 'RepeatLast' and y is NonSacredTool... i just learned by seeing the tool box on the left (and the way the hotkeys go down the first row of keys) that if i wanted to get back to a tool i was just using, y would take care of it for me. i've never used g so i have no idea what it does *shrug*