Musicians
http://www.cambodianlivingarts.org/
The very actice and wonderful performance group with daily performances in Cambodia

http://khmerarts.org/sophiline-arts-ensemble
The "Sophiline Arts" dance and music ensemble in Cambodia

http://www.asianclassicalmp3.org/mahori.htm
Some recordings of Mahori instrumentals presented by Cliff Sloane

http://cambodiamusic.org/     
Huge online archive with music from Cambodia

http://en.wikipedia.org/wiki/Category:Cambodian_musicians 
a Wikipedia list with musicians from Cambodia

http://www.asianclassicalmp3.org/mahori.htm
Some downloadable MP3 audio files, examples of Mohori music