I got request for maya 2008 version. It was released.
It can download below.
http://www.creativecrash.com/maya/downloads/shaders/c/ambient-occlusion-for-maya-software
Ambient Occlusion for maya2011 32bit & 64bit version was released.
It can download below.
http://www.creativecrash.com/maya/downloads/shaders/c/ambient-occlusion-for-maya-software