Who ever use Amazon EC2 Window instance will know that for the first launch of the instant, you need to use ec2-get-password command line tool to retrieve the preset administrator password. For a non technical user, this is a barrier to use EC2.
Lately, my ex colleague team is building a web application to ease the user to use EC2 and Eucalyptus service. Above problem is a major problem for them too because it involve x509 certificate and encrypted string that gathered from EC2 API.