If you're an expat and have no plans to return to the US, this is an option worth considering.
http://www.reuters.com/article/2012/04/16/us-usa-citizen-renounce-idUSBRE83F0UF20120416
http://www.reuters.com/article/2012/04/16/us-usa-citizen-renounce-idUSBRE83F0UF20120416
