I need a way to move a window between desktops in Lion/Mountain Lion with a keyboard shortcut only (*i.e.* no mouse involvement). From [this similar question](https://apple.stackexchange.com/questions/22350/used-to-be-possible-in-snow-leopard-to-move-an-app-between-desktops-with-a-key), I'm aware that it can be done by holding down the title bar of a window and activating the *Move to Left/Right Space* shortcut, but that doesn't meet my requirements.

I don't much care how it's achieved, as long as it's relatively efficient and can be activated by a keyboard shortcut (if it's just a script, that's fine, I can assign a keyboard shortcut to it another way).