This is a mirror of the Fred 2.0 download area:

http://www.ibiblio.org/fred2.0/wordpress/?page_id=10

It contains:

Authority files from December 2006

Library of Congress Bibliographic Records (courtesy of Cassey Bisson and the Mellon Foundation)

Superclass chains for LCSH Topical Headings (27MB compressed, but be careful - uncompresses to about 1GB)