Webservices.Org's latest survey research into SOA deployment sites uncovered a vital missing piece. That is, Web services and SOA have had very little penetration among small-to-medium-size organizations, thus far.
Having large volumes of Web services is still primarily the domain of large companies or organizations. In Webservices.Org's study of 1,000 companies of all sizes, for example, 27% of organizations with 10,000 or more employees report having 21 or more Web services, compared with only four percent of the smallest companies. There isn't an appreciable rise in number of Web services until we hit the 10,000-employee mark.
Small to medium-size businesses need to work with what they have, and don't have armies of developers and system architects that can "experiment" with new approaches. As larger companies wring out the bugs and challenges in their SOA deployments, and vendors come out with better tools, we may begin to see more SMB adoption of SOA. But for now, SOA is a Global 1000 project.