what is the best way to install ros on ubuntu 12.10

edit

EDIT: official repositories out (compiled for ubuntu 12.10 and 64 bits only as of 19 nov): You can follow the installation instructions here: http://www.ros.org/wiki/groovy/Installation

Old answer:

Actually, ROS is already ready for Ubuntu 12.10 via apt-get install. You just need to use the following repository:

sudo sh -c 'echo "deb http://packages.ros.org/ros-shadow-fixed/ubuntu quantal main" > /etc/apt/sources.list.d/ros-latest.list'

and then do

sudo apt-get update

and install ros and your favourite stacks with

sudo apt-get install ros-groovy-STACKNAME

Hope this helps, remember to switch back to the main repository in some days when the official version is ready. The repository I gave your is not the main one.