In nano 2.0.6 (as shipped with OS X), Control-Space seems to default to "move cursor to next word". However, when I install the homebrew version of 2.2.6, it appears to not be setup to do so.
No worries, I thought, and pulled up the documentation, and found that the nanorc setting for that would seem to be "nextword". So I try a nanorc with a setting:
bind ^Space nextword all
But launching homebrew's nano 2.2.6 gives me 'Could not map name "nextword" to a function'.