There is no surprise here. As expected, the U.S. National Archives and Records Administration (NARA) has announced a new fee schedule. The prices all went up although perhaps not as much as had been feared. The increases go into effect October 1, 2007.
You can read the official announcement at http://a257.g.akamaitech.net/7/257/2422/01jan20071800/edocket.access.gpo.gov/2007/pdf/E7-16233.pdf.
Warning: the announcement is written in the finest governmental legalese. You will find it a bit difficult to decode. However, all the information is there.