There is a great deal of source separation information on the web. Let me in particular direction your attention to:
Tony Bell's ICA page
Paris Smaragdis' ICA & BSS page (MIT)
Allan Barros's ICA page in Japan.
Andrzej Cichocki Shun-ichi Amari
Mark Girolami's Home Page
NIPS*96 Signal Processing Workshop
BSS Research (Experiments at RIKEN in Japan)
Acoustic localization has less of a web presence, and I have not yet had time to post here what I do know of.