Change your Gnome 3 menu with cinnamon

Cinnamon is a Gnome 3 fork that allow you to have a panel at the bottom with a classic Menu, this is useful for people that want to use Ubuntu with a classic Bottom Menu.

More info about Cinnamon can be found in here.

To install Cinnamon on Ubuntu 12.04 Precise Pangolin, use the following PPA:

sudo add-apt-repository ppa:gwendal-lebihan-dev/cinnamon-nightly

To install Cinnamon on Ubuntu 11.10 Oneiric Oncelot, use the following PPA:

sudo add-apt-repository ppa:gwendal-lebihan-dev/cinnamon-nightly

sudo apt-get update
sudo apt-get install cinnamon

and then restart your computer. Before login change your default desktop environment and choose cinnamon.
This is screenshoot of cinnamon menu.