Fullscreen Emacs on Mac OS X
I've added my copy of the patched git repository to my site as well as the binary I created. Find them here.
The command for toggling fullscreen mode on OS X is:
M-x ns-toggle-fullscreen. If you want to bind it to a key sequence, add something like the code below to your .emacs file (I use M-return).
(global-set-key (kbd "M-RET") 'ns-toggle-fullscreen)