There are quite a few of those here in Hong Kong - the corporate and personal tax rates are quite friendly, and capital gains/dividends are not taxed at all. There are quite a few ways to keep most of your money here, and the regulations are simple.

That said, while the technical community is growing, it is still very small. Hiring can be quite difficult and you have to prove to the government that you worked hard to find a local before they will let you hire an expat. But it can be done.

I'm no expert, but Delaware is likely going to be a strong contender. It's the most popular place to incorporate in the US for a number of reasons.