http://www.cityweekly.net/utah/article-459-16910-a-very-nice-article-for-expats-but-the-author.html
Excerpt below:
Taxing Matters I also met another type of American expatriate, particularly in London: high rollers who sported American accents but discreetly reminded everyone that they were no longer American. These were the tax expatriates, super-high earners who renounced U.S. nationality in large part to avoid the global reach of U.S. tax law. Facebook’s co-founder, a Brazilian-born U.S. citizen now residing in Singapore, recently denationalized himself in this manner. No doubt, just as legal persons (corporations) often decamp to more favorable tax locations, more and more natural persons will seek to expatriate themselves in the same manner.
As much as I think of myself as a practical individual, I am emotional to the extent that I believe that to take on a nationality, you should identify with and love the country in question. I love both the United States and Greece, and I would never renounce either nationality, regardless of some potential tax benefits.
U.S. citizens must file income tax, no matter where they live. Having said that, the vast majority of your foreign income is exempted, unless you are a super high earner. As an American abroad, it’s important that you file your taxes and keep the IRS apprised of your income. Many Americans living and working abroad forget to do this, and it’s a potentially costly mistake.
Certain actions can cause you to lose your U.S. nationality, such as taking up arms against the United States, formally renouncing your U.S. nationality or, surprisingly, entering the U.S. on a foreign passport. This is a lesser-known detail passed on to me when I lived in London. We were registering our London-born daughter as a U.S. citizen, and the consular official warned us not to travel with her to America before she got a U.S. passport, “as she could forfeit her nationality.” When I took up Greek nationality, I consulted an immigration attorney with a specialty in dual nationality. The reader should do the same: Always seek legal advice when making such key decisions.
So all of you Brockers do you REALLY think this guy is fully compliant with US tax laws . Yes thats what I thought.