EC2 Instance Cloning

You can make an AMI of an existing instance, and then launch other instances using that AMI.

The easier way is through the web management console:

1. go to the instance
2. select the instance and click on instance action
3. create image

Once you have an image you can launch another cloned instance, data and all. :)

You can do it very easily with a Cloud Management software -like enStratus, RightScale or Scalr (disclaimer: I work there). With the cloned farm you can:

1. Create a snapshot or a pre-made image to launch another day
2. Duplicate your configuration to test it before production