If you’re like me then you no longer use multiple windows in Terminal.app at all, relying on tabs in a single window instead. Unfortunately this makes the hotkeys for switching between windows somewhat useless, so I did this SIMBL plug-in a while ago to change ⌘1-9 to switch between the tabs in the current window instead. I completely forgot to post it, but you can now download it here. See this post for how to install.