There was an interesting blog posting this past week on F5’s DevCentral, As a Service: The many faces of the cloud. The author attempts to organize various Technology Service vendors who use Cloud Computing as part of their model. As much as I hate to send the casual reader of this blog offsite, it is worth a read.
Although this article is focused on solutions that can be offered to external customers, keep in mind that these sorts of services can also be designed for internal consumption by IT users within the organization.