No. We will not operate the business in the United States, nor will we respond to requests outside of our operating jurisdiction.
Good answer Zhou... but the US believes you are ALREADY in their jurisdiction, merely because US residents do business with you. As of two days ago, http://www.fincen.gov/statutes_regs/guidance/html/FIN-2012-A001.html
The problem with keeping the private records of your customers, is that WHEN the US demands your records, they'll have a treasure trove of information with which to harass people.
With that said, it's inevitable that some portion of the Bitcoin businesses will go the route of full legalization/licensing. I think, strategically, that is probably a net benefit, because it allows Bitcoin to grow and gain adoption. I'm okay with it, because I also know Bitcoin itself is inherently beyond the grasp of the state - and so the longer it's allowed to exist and grow, the better. If the government thinks it's regulating Bitcoin because it's managed to regulate most exchanges, then I'm okay with them having that delusion. It will keep them docile.