I was researching a sound system called WOW on the internet. What WOW does is retrieves spatial data from a stereo track (two channels, left and right), and does some magic to make the sound come out at you, making it seem like you've got surround sound with only two speakers. The other amazing this the system does is called TruBass. It does some other magic that makes your ears think that you're getting better bass than your speakers can physically handle.
I came across http://www.wowthing.com/ and they have this tiny cheap-LAN-hub-sized box called the WOW Thing that does the effects from any sound source. It's only 25$!!!
Actually, most people running windows can try it out. Windows Media Player 7 and above have the WOW effect built in, you just have to turn it on. To find out how, just go to the help index and type WOW. it'll walk you through it.