I read about this type of business outsourcing in the book the "Four Hour Work Week". While I have not been able to reduce myself to a four hour work week just yet, I was able to implement quite a few ideas. And it was definitely an interesting read.
About outsourcing it had the serious part of business outsourcing where you might hire someone to do research for you, and just as this article mentions it would be advantageous to hire someone from a different country.
It also had a funny story in which a writer had an ITES contract for his social life and began to have this worker write his wife letters for him. The English language differences made for some funny miscommunications between the outsourced worker and the writer's wife!
It also had some tips in the book for how to pick the right ITE job site for your needs.