Check out Frank Smith’s brand new Khmer Language Study Website, StudyKhmer. It’s just begun, but already there’s a video podcast available (the first one is on the particularities of Khmer Surin).
For those of you not already familiar with the inimitable Lokkru Frank Smith, he’s the Khmer Language Program Coordinator and a teacher of Khmer at the Southeast Asian Summer Studies Institute (SEASSI) at the University of Wisconsin-Madison, and therefore is the primary introduction for many new students of Khmer in American (and beyond!).
This looks like it’s going to be a great site, and is highly recommended.