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.
Jean-François Cardoso
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.