If "the cloud" becomes an important export, people in Notamericastan beware: Screw with us, and find out your data is subject to American law, subpoenas, and courts.
Everyplace has laws, subpoenas and courts. The US legal system has certain well-known defects, but so do many other countries' systems.
My point is that people might be subject to a rude shock when they realize their data produced by and for their business processes is subject to the laws of a foreign country.
Ah, yes, that's certainly a potential sticking point. It will be interesting to see how legal systems evolve and adapt to how easy it is to "globalize" via the internet.