On December 15, 2006 PostCom reported :

From the U.S. Postal Service: “We’ve been asked if the recently passed Postal Reform legislation will have any effect on the current proposed pricing change. It will not. We are still on target for a May 2007 implementation of new prices and mailing standards. We’ll have our revised mailing standards Federal Register published in early January 2007

Related link: USPS Proposed Rates and Fees for Spring 2007