Dr. Werner Vogels, CTO of Amazon (not just Amazon Web Services), unveils some interesting information on RedShift, Amazon’s service for data-warehouses on demand. Its petabyte performance envelop and on-demand pricing are awesome enough, but here I would like to point out some of the security features of the service.
These ranges from physical controls to staff monitoring to multiple firewalls to hardware encryption. The blog post contains quite a bit more information. The controls are also audited. Unfortunately, these lists are not publicly available, though I have seen similar extensive statements from other providers.
If you think you can do better, you should consider starting your own cloud provider!