The Linux Mint blog published an in-depth preview of the upcoming Linux Mint 12
We’ve been using application menus, window lists and other traditional desktop features for as far as I can remember. It looked different in KDE, Xfce, or even Windows and Mac OS, but it was similar. Gnome 3 is changing all that and is developing a better way for us to interact with our computer. From our point of view here at Linux Mint, we’re not sure they’re right, and we’re not sure they’re wrong either. What we’re sure of, is that if people aren’t given the choice they will be frustrated and our vision of an Operating System is that your computer should work for you and make you feel comfortable. So with this in mind, Gnome 3 in Linux Mint 12 needs to let you interact with your computer in two different ways: the traditional way, and the new way, and it’s up to you to decide which way you want to use.Linux Mint 12 Preview
For this, we developed “MGSE” (Mint Gnome Shell Extensions), which is a desktop layer on top of Gnome 3 that makes it possible for you to use Gnome 3 in a traditional way. You can disable all components within MGSE to get a pure Gnome 3 experience, or you can enable all of them to get a Gnome 3 desktop that is similar to what you’ve been using before. Of course you can also pick and only enable the components you like to design your own desktop.