Market indicators support the notion that momentum for Software delivered as a service is growing. This software design and delivery model makes it more viable and less expensive to share one application across many organizations by allowing many more instances of an application to run in a common environment, vastly improving on the old client/server model. While not all SOA implementations lend themselves to use of SaaS, under the right business conditions SaaS can contribute to quicker SOA implementation, a predictable expense stream, and faster ROI.