This week’s Northfield News has a story titled Price increase creates rush for passports (see Rice County’s announcement, New Passport Fees, Effective July 13, 2010.)
At the end of the article is this curious one-liner:
The cost to renounce your U.S. citizenship is $450.
If you’re really interested (yikes!), see the Wikipedia entry Renunciation of citizenship and the US Gov. page, Renunciation of U.S. Citizenship.