Y'all might find this interesting:

Rik Ede is considered to be the world’s leading authority on surround sound in games having spent 5 years working for Dolby as 5.1 evangelist, 2 years as a consultant to DTS and more recently he just finished a 2 year stint as the PLAYSTATION® 3 surround consultant to Sony's R&D group. He discusses his work on Sega Superstar Tennis, SingStar PLAYSTATION 3 and WipEout HD: