ESL anyone?

Okay I'm going to keep this really short. Have you ever taught/ considered teaching ESL (English as a Second Language) in Mexico, Hong Kong or any European country? If you have then I'd love to know what your experience was like.

A friend and I are seriously considering taking a year off from our routines to do some volunteer work/ teaching in a foreign country. Apart from feeling like we're doing something meaningful, we will also get a chance to travel, experience a different culture and learn a new language. Right now this is our pet project and we're both trying hard to make it happen!

Any suggestions or leads to help us land jobs are more than welcome...