It is actually quite easy to get your AMI up and running. First, you need to create an Amazon Web Services [2] account. Once this is done you can use the Amazon console, or elasticfox [3] (a Firefox extension to control your EC2 instances) to create/launch your AMI's.
This alone is not enough. You need to allow your EC2 instance of the WSO2 product to accept traffic from other machines. This can be done by modifying the security group. This can be done via the EC2 dashboard, or via elasticfox. What you need to do is allow https traffic on port 443 from your IP address.
Once you have setup your security group, you can navigate to your WSO2 product at https://{$public dns}/carbon.
When you first startup your WSO2 product has a default admin password (username: admin and password: admin). The first thing you should do is to change the administrator password by
Click on 'User Management' on the left navigation
Under the 'System User Store' click users, and then
Change the password for the Admin user
Click on 'User Management' on the left navigation
Under the 'System User Store' click users, and then
Change the password for the Admin user
Once this is done, you are good to go.