Linux Mint 13 LTS "Maya", based on Ubuntu 12.04, has been released today and is available for download in two editions: one running the latest MATE 1.2 (GNOME 2.3.x fork) and another one using Cinnamon 1.4 (GNOME Shell fork).
Linux Mint 13 MATE edition:
|Mint Menu now works with MATE Desktop|
Linux Mint 13 Cinnamon edition:
Besides the desktop environments, another important change in the latest Linux Mint 13 is MDM (Mint Display Manager), a new display manager based on GDM 2.2 which comes with a graphical configuration tool and supports themes, that's available for both MATE and Cinnamon editions:
Also, the Mint-X theme has been improved and now supports GTK3.4 (Cinnamon edition):
For more information on the latest Linux Mint 13 LTS (long term release), check out the official release notes.
If you're using Linux Mint 13 Cinnamon edition and want to install some extra applets and themes, see: Cinnamon Themes, Applets And Extensions PPA Repository [Ubuntu, Linux Mint, LMDE]