https://news.ycombinator.com/item?id=3944339
http://www.guidemesingapore.com/incorporation/introduction/s...
AFAIK, you can always change to another country. However, I can't see the US taking it very lightly that you've denounced your citizenship. In other words, I would assume they would try to make your life a living hell if you wanted anything to do again in the US. (Have no idea, just assuming based on preconceptions about the way the US already treats it's citizens who live outside of it already) Derek seems pretty open, might be worth trying to reach out to him.
http://gyrovague.com/2013/10/30/half-the-donut-why-an-entrep...
Personally, I'm going for Australia though -- there's more to life than low taxes.
http://www.treasury.gov.au/Policy-Topics/Taxation/Pocket-Gui...
It's actually quite a serious problem for the kiwis, because they do the hard yards of bringing immigrants up-to-speed with the local culture (eg English language lessons), only to have them jump the ditch (Tasman sea) to Australia.