This repo lets you easily bring up an LEPP (Linux/Nginx/Postgresql/Php) stack using vagrant on either Ubuntu 12.04 or Centos 6.3.
vagrant init centos63-32 http://developer.nrel.gov/downloads/vagrant-boxes/CentOS-6.3-i386-v20130101.box
vagrant init precise32 http://files.vagrantup.com/precise32.box