I can confirm that eye-pod isn’t too far off here on numbers, but there’s a big dependency on how far up the talent scale you are looking.
I’ll speak from my own experience: If you are looking for an experienced finance manager, you’ll save 20-30% by going overseas. However, if you are looking for an entry level accountant, you can save 50-60%. It’s very dependent on skill level. My belief is that those accountants today will become the managers of tomorrow-this will increase the skill and supply higher up the food chain, and outsourcing will work it’s way up.
So, the threat today of the production/manufacturing worker is the threat tomorrow of the service professional.