FYI:

"Welcome to the new USCIS Genealogy Program Homepage
The new USCIS Genealogy Program will become effective on August 13, 2008. The Genealogy Program is a fee-for-service program designed to provide family historians and other researchers with timely access to accurate information and good copies of historical immigration and naturalization records. "

http://www.uscis.gov/portal/site/uscis/menuitem.eb1d4c2a3e5b9ac89243c6a7543f6d1a/?vgnextoid=d21f3711ca5ca110VgnVCM1000004718190aRCR D&vgnextchannel=d21f3711ca5ca110VgnVCM1000004718190a RCRD

Thanks for posting this link, it will be very useful to me :)