The Amazon EC2 Beta is now open to all developers and any developer can sign up to start using Amazon EC2 today (view forum announcement). Additionally, Amazon EC2 has launched “Large” and “Extra Large” instance types to provide more memory, CPU, and instance storage, and are based on 64bit technology. The Large Instance is equivalent to roughly four Small Instances (original instance), and the Extra Large Instance is roughly equivalent to eight Small Instances. This was a popular request from customers that we’re very happy to address with this release. Read more details about these Instances.