Andy
It might be worth posting the same question over on the holography forum.
http://www.holographyforum.org
I'm sure I remember somewhere in the deep and distant past that this was discussed there.
Colin Kaminski who runs the forum will probably know.
Cheers
Jem
Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.”... Douglas Adams 1952 - 2001