Yeah I was really pumped into going to Japan or something after I did the course, but found out most offers are in China, Taiwan etc for inexperienced teachers (which is fine)....a lot of/most of offers are done over the web though and some can be dodgy so you have to do your research before jumping into a agreement, but Global and most other TESOL training companies do steer you in the right direction and will help you get a job if you want it (Global also have a 6 month guarantee or your money back when you do a course with them [you have to apply for at least 30 jobs spread over several countires though]).
I didn't choose to use the guarantee though as I've decided to go to uni now and continue on from my Diploma, but also incase I decide to get back into TESOL as you can go to higher-paying countries like Japan/Germany etc if you have a Bachelors degree. It doesn't matter what field the Bachelors degree is in as a lot of them just require you need one by law to be able to enter the country on a work visa.
But for entry level in the TESOL industry, China/Taiwan and a lot of the other 'lower-economy' asian countries is where the boom is and the place to go.