From freshmeat: "This is a significant release of Fedora that includes a complete repackaging as a proper Web application. A new installer application makes it easy to setup and run. It now uses Servlet Filters for authentication. The Fedora repository can also be configured to calculate and store checksums for content. The RDF-based Resource Index has been tuned for better performance. A new high-performing RDBMS-backed triplestore has been developed that can now be plugged into the RI."

For full details see the release notes at fedora.info.