Exactly. There's a fine line between a business trip, and something that requires a work visa. I'd imagine that the best way for a foreigner to work in the US

Exactly. There's a fine line between a business trip, and something that requires a work visa. I'd imagine that the best way for a foreigner to work in the US on non-US projects is if a body-shop (possibly owned by them - I think most people can own a US company) hires them, then subcontracts them out to the offshore employer. The question is how they get everything set up while they don't have a work visa. I wonder if a business visa would allow them to set the paperwork up? Anyway, it's madness.