Over at the blog Chasing Ray, Colleen Mondor has a terrific roundup of posts on books 1. set in southeast Asia, and 2. by authors from that area. You'll find the information at Chasing Ray's One Shot World Tour: Southeast Asia.
Although I didn't yet get to it, I had hoped to read (in time for the tour) Over the Moat, by James Sullivan, about love and a bike trip in Vietnam. I first heard about this memoir on National Geographic Traveler's list of "50 Books of Summer." Soon!
Keeping southeast Asia in mind, I came across a lovely blog, Nye Noona, written by a woman who grew up in Laos, Thailand, and New York City, and now lives in the southeast U.S.