I don't know if this or the 'White Pages' breach is worse
Via America’s Finest News Source:
Postmaster General Loses Laptop; Zip-Code Data Of Millions At Risk
July 25, 2006 | Issue 42•30
WASHINGTON, DC—The U.S. Postal Service has confirmed that a laptop computer issued to Postmaster General John Potter and containing the zip-code information of over 280 million Americans was allegedly left in a taxicab Monday evening.