Another good website specializing in Asia is www.agoda.com - It's similar to asiatravel.com but I like Agoda's points program for repeat customers better and I think they offer slightly more hotels overall in most cities.

The best thing about Asiatravel.com, IMHO, is that they provide a screen with the hotel's name and address written in the native language, so you can show it to your cab driver. I wish Agoda offered that feature.