Amazon has added a new Cluster GPU instance to its Elastic Compute Cloud (EC2) platform, which provides scalable computing capacity in the cloud.

The GPU Quadruple Extra Large Instance has a pair of Nvidia Tesla M2050 Fermi GPUs, each of which has 448 cores and 3 GB of RAM. You can use up to 8 GPUs in a cluster (need to ask Amazon if you want more).

This computing power does not come cheap: $2.10/hour or .75/hour if you pay an upfront fee of $5k/year.