Just read an article about how cloud service brokers are starting to pop up. Basically, they shop for best - fit cloud storage deals and then sell them to customers.
This, of course, means that the actual cloud provider could shift from time to time. Even if the cloud guy keeps the ip addresses the same, those gateways are gonna change. Could be fun times.
Generally UberCloud helps to understand how to access the high performance computers at professional data centers.