If you want to install gnome shell in your brand new Ubuntu 11.10 .
well, I am going to tell you easiest way to install gnome shell 3.2 , without breaking anything .
just open terminal and copy and paste code
wget http://alokyadav15.googlecode.com/svn/trunk/install_gnome.sh
sudo chmod +x install_gnome.sh
sudo sh install_gnome.sh
after that logout and login back in back and choose gnome as default session
then you will get something like this
