This script will install ruby, rails, mysql, nginx, and mongrel on ubuntu (or debian - probably)

Thanks to smarticus for a lot of this, I diverge and install nginx instead of apache/passenger.
See also: http://s3.amazonaws.com/smarticast/smarticus-railsrumble2008.mov

HOW TO USE IT
1) Create a user with sudo acccess
2) Login as that user
3) copy this script to the server
4) sudo sh rails-ubuntu-setup.sh