Discuss the installation instructions by editing this page, and fold the comments back into the instructions themselves to pay it forward.
Outdated -> http://nova.openstack.org/getting.started.html
or check out the Install Fest Instructions from the 1st Openstack Summit:
Outdated -> http://wiki.openstack.org/NovaInstallFestInstructions
Fairly Recent -> Nova Installation notes from developer meeting Jul 29, 2010