Other links:
RESEARCHERS:
http://user.cs.tu-berlin.de/~brandeis/
The homepage of the artist and ethnomusicologist Hans Brandeis, with many pictures, videos and audio files and informations about the music of the Philipino ethnic tribes, the SAOT project and his duo “Flute and Voice”

http://beta.upethnom.com/
The Homepage of the United Philippines Center for Musicology  

http://www.sinagtala.net/
Sinag Tala is an organization that supports artists of the Philippines in classic, choral and ethnic music.

http://www.kipas.nl/MainMenu.html
The gallery and informational pages of  Fekke de Jager

http://litera1no4.tripod.com/tboli_frame.html
A huge article about the T'boli by  Faye Velasco