"This tutorial shows you how you can install the GNOME 3 desktop
on Ubuntu 11.10 with the shell extensions that are used in the
Linux Mint 12 release (Lisa) (these shell extensions are called
Mint GNOME Shell Extensions - mgse). These shell extensions give
GNOME 3 the look and feel of GNOME 2. For those who prefer GNOME 2
this tutorial shows how to install Mate from the Linux Mint
repositories on Ubuntu 11.10. Mate is a GNOME 2 fork."