There are few websites with information on caves of Cambodia. Most that exist are just tourist pages.

cave fauna
My photos of some cave fauna

The Killing Caves
My article on the Killing Caves at Battambang published on WildAsia

BHB publications
Books published by BHB on Cambodian caves

German-Cambodian 2005 expedition
German-Cambodian exploration of Cambodian caves 2005-6