2010 November: I finished upgrading the last of my work servers running Linux Fedora 13 to 14 over the weekend and all in all, one of the smoothest upgrades in memory. It took maybe an hour for one and two hours for the other, a reboot and then another 1/2 hour downloading and installing updates since the DVD was released.
No new features that particularly appeal to me or that we use, but it will keep security updates fresher as older versions become unsupported.