Change keyboard mapping (Input Source) from terminal in OS X

Question

I'd like to change the keyboard mapping from command-line (Terminal) in Mac OS X Lion (10.7).

I can manually set it (System Preferences -> Language & Text -> Input Sources), and there's a nice option that lets me use different input sources for different documents, but I'd like to bind it to a key under zsh to easily swap between Qwerty and Dvorak layouts (I'm learning Dvorak, and having the option to switch easily would be sensational).

Answer 1

By default the input sources are bound to Command+Space(+Shift for reverse direction), which is the same as used by Spotlight (ask Apple why...). Go into System Preferences > Keyboard > Keyboard Shortcuts tab > Keyboard and Text Input in the listbox on the left to select a different key sequence, or select Spotlight in that listbox to disable the Spotlight binding from shadowing the normal binding.