Razer today released new Mac drivers for Orochi (v1.03), with one addition: Added support for button assignments.
Get it here.
That's all nice, except that the possible button assignments are very limited. There's nothing like "Backwards/Forwards" assignments or Dashboard or such. Also there are mouse buttons only up to 5 (Mouse Button 3/4/5), even though the mouse has 7 buttons. Also no support for macros. You can only bind single keys, but nothing like Command+left or such.
Anyways, a nice update, but I hope Razer will further improve the driver. Also a possibility for Mac users to update the firmware of their mouse would be really welcome addition.