Congrats to the GNOME team for another great looking release! You can check out the GNOME 3.6 Release Notes for details of what’s changed since 3.5.
GNOME 3.6 is the latest update to GNOME 3 and represents 6 months of work by the GNOME Project. It delivers a number of major new features, including a reworked Activities Overview, updated message tray and notifications, an enhanced Files application, as well as improved accessibility support and integrated input sources for using different languages. It also incorporates a host of smaller enhancements. Together, these changes make GNOME 3 better than ever before.
You can get GNOME 3.6 here, either in a live CD or the details for your existing linux distro.