The Thai Sky Festival is on in early March 2009
Thai Sky Festival 2009 - Home Page
Other than that there is very little skydiving in this part of Asia. I jumped at a one off event in Vietnam this year but I don't think there will be any jumping there again any time soon.
You can skydive in Japan but it's about US$60 a jump.
I think the easiest thing to do is get on a flight to LAX or Australia and jump there!