Jan van de Sandt has pushed out a new Pharo/Seaside EC2 instance:
The update to the Ubuntu server makes it easier to run the AMI as a Micro (t1.micro) instance type. This is currently the smallest and cheapest EC2 image type. The image type is very well suited for running Seaside web applications. When your application becomes more popular you can scale by using a bigger instance type or by running multiple instances.
Follow the link to get the particulars, such as the AMI instance id.