The highlights of the release are listed as follows:
- New and much-improved NFS Lock Manager (NLM) client
- Support for the Camellia cipher
- boot loader changes allow, among other things, booting from USB devices and booting from GPT-labeled devices with GPT-enabled BIOSes
- DVD install ISO images for amd64/i386
- KDE updated to 3.5.10, GNOME updated to 2.22.3
- Updates for BIND, sendmail, OpenPAM, and others
The complete release notes are of course also available, as is the errata list. This release is supposed to be supported by the security team until November 30th, 2010. Using torrents for downloading this release is usually preferred, but you can of course also check your local mirror.