What are some of the unique advances in technology that make off-shore sourcing feasible and thus serve to create a competitive advantage.

What is the driving force behind offshore sourcing? What are some of the unique advances in technology that make off-shore sourcing feasible and thus serve to create a competitive advantage. Include a brief summary of an article that addresses IT sourcing and either its reference information or the Web URL so that your classmates can read the article if they wish.