De ubuntu 11.04 a Gnome 3

sudo add-apt-repository ppa:gnome3-team/gnome3
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get -f install
sudo apt-get install gnome-shell gtk3-engines gnome-tweak-tool gnome-themes gnome-themes-selected gnome-themes-standard

Para integrar Network-manager 




sudo add-apt-repository ppa:emergya/ppa

sudo apt-get update

sudo apt-get install gir1.2-networkmanager libnm-glib4 libnm-glib-dev libnm-glib-vpn1 libnm-glib-vpn-dev libnm-util2 libnm-util-dev network-manager network-manager-dbg network-manager-dev network-manager-gnome wpagui wpasupplicant network-manager

Para conectarse a redes cifradas la contraseña la teneis que añadir en "Conexiones de Redes" 

Un salduo