Today, Amazon announced a new dense storage instance type: D2. These new instance types are designed for processing large data sets. More information about the new instance types can be found here:
https://aws.amazon.com/blogs/aws/next-generation-of-dense-storage-instances-for-ec2/
Skeddly also supports this new instance type. So you can use Skeddly to change your existing EC2 instances to the new D2 instance type, or you can launch new EC2 instances using the new type.