I've been living in Thailand for a year now and its an ideal location for development. The cost of living is low, or a relatively high standard of living is available at a low cost. Peaceful locations are abundant and western comforts are not far away.
There aren't a lot of startup or tech-oriented people around though so an integral part of the idea is to create a small community of smart and creative people.
If it sounds like it might be interesting to you, you can post comments here, or contact me at my gmail address (thailandstartup) - if there's enough interest I'll start fleshing out a more concrete idea and putting a plan together.