1. Amazon.com ec2: Ec2 frequently answered question, http://aws.amazon.com/ec2/faqs
2. Amazon.com web services: Products and services, http://aws.amazon.com/product
3. Global earthquake model, http://www.globalquakemodel.org
4. Gogrid website: Gogrid cloud services, http://www.gogrid.com
5. Rackspacecloud website: Rackspacecloud service, http://www.rackspacecloud.com