I'm going to Tanzania next month, and I am definitely getting vaccinated. Actually, I have to, in order to be allowed into the country. So far I've gotten meningitus and tetanus...still need to get Hep A, yellow yever and typhoid. Even if it wasn't required, I think it's a good idea. You're throwing your body into an alien environment, would be best to prepare it.
Before I did a summer abroad in Taiwan and China, I got vaccinations (tetanus, MMR, Hepatitis A) at my university's health clinic. After I graduated and got a job (and insurance), I got the Hepatitis B series of vaccinations at my primary care physician's office.
Most of the vaccinations I needed were pretty common. I suspect most doctors will be able to provide what you need.
Yes, I've been to southeast Asia (Cambodia, Laos, and Thailand). I got the recommended vaccinations. Why wouldn't you?
The big ones in that area are Cholera and Typhoid. I think I prefer a little shot to coming down with either of those diseases, don't you? And after having been there, I think the chances of being exposed to one of those diseases isn't all that remote.
Yep, definitely get vaccinated. Also if you're going for longer than a week try to get the local flu vaccine. It's different depending upon where the WHO thinks the different influenzas will be. Flu sucks when you're travelling.