Creating a New Image for EC2 by Rebundling a Running Instance
http://alestic.com/2009/06/ec2-ami-bundle
There are two primary ways to create an image for EC2:
1. Create an EC2 image from scratch. This process lets you control every detail of what goes into the image and is the easiest way to automate image creation.
2. Rebundle a running EC2 instance into a new image. This approach is the topic of the rest of this article.