Lookie here...

December 3, 2001

Travel.state.gov: Possible Loss of U.S. Citizenship and Foreign Military Service (via rc3.org)

"P.L. 104-191 contains changes in the taxation of U.S. citizens who renounce or otherwise lose U.S. citizenship. In general, any person who lost U.S. citizenship within 10 years immediately preceding the close of the taxable year, whose principle purpose in losing citizenship was to avoid taxation, will be subject to continued taxation."

Ahem. So who wants to rebutt that it is, or should I say, was possible to avoid taxation by renouncing one's citizenship?