Two months ago Amazon Web Services released a new "Cluster Compute" EC2 instance type, the cc.4xlarge. This new instance type is targeted for High-Performance Computing (HPC) such as computationally intensive scientific applications. The major differences between this and other EC2 instance types are: Dual quad core "Nehalem" X5570 2.93 processors: compared with X5550 2.67 processors for the next