I've spent 4 months on the Cambodian Coast. I've stayed in a lot of places. By far the best, in terms of food, atmosphere and value, is Le Bout de Monde, in Kep.

Here is a link to an article, with photos, that I wrote about Le Bout de Monde:

http://www.rucksackwanderer.com/STORIES/secretkep.html

Here is my more general guide to Cambodia:

http://matadortravel.com/travel-guides/cambodia/rucksack-wanderers-guide-to-cambodia

And here is one for true adventurers:

http://matadortravel.com/travel-guides/cambodia/rucksack-wanderers-secrets-koh-rong-cambodia

Please feel free to contact me with questions or comments.

-Tim

www.rucksackwanderer.com