A friend send me this link today, it's a very nice sound experience. It's better if you keep your eyes shut and you must use phones.
http://premson.net/sounds.htm

I've checked out holophonics, but I'm a music nerd.

WOW I did not get the sounds on that site to work but I googled and found this site with the crazy matchbox sounds. That shit made almost freak out man! I'm sure my gf will believe satan is in da house if I play this stuff to her!

Here's the link

http://weblog.404creative.com/2007/06/03/auditory-illusions-holophonic-recordings/

taht shit is twisted.