We've put together an installer that will help people get up and running with Eucalyptus Open Source quickly. To start with, it is being distributed on USB drives at Cloud Expo in NYC starting June 6th. We are excited about how easy it is to get Eucalyptus installed using this new installer.
There are some simplifying assumptions that have been made which are that you are running on CentOS 5.6, and running in MANAGED_NOVLAN network mode. We'll be posting more information on our site in the coming days. In the mean time, please ask questions by replying to this thread.