I found this wonderful graphic created by Peter Laird in his blog.
Peter’s blog has all the descriptions of the buckets.
The Public Cloud bucket is heavily under-reported. There are roughly about 1200 public data centers in the US alone that are quite happy to rent you a server or cabinet. There are a host of data center market places that will connect you to a data center provider. Here are a few:
Find a Data Center
Data Center Marketplace
In particular, the telecom companies, like 365 Main, SuperNAP, Qwest, Verizon, Level 3 Communications are quite happy to sell you connectivity AND servers and are perfect for large cloud deployments that need geographic spread and high bandwidth.
