I'm sure it's been talked about before but I wanted to post a link up to this AES paper about speaker placement for holographic imaging.
Sorry, that should be Phantom Source Imaging:
http://www.essex.ac.uk/csee/research...0placement.pdf
and then it's talked about in Stereophile in an Audio Physic Virgo 2 review as Joachim Gerhard, the designer of the Virgos, was involved in the research paper.
Cinerama Setup
Would love to try it out soon - needs a room re-configuration.