Clearly, SOA and SaaS are converging. The movement and direction are clear. Take, for instance, the rapid rise of SaaS. Based upon current trends, IDC predicts a compound growth rate of 20% per annum for SaaS, set against the overall software market, which is only growing at around 6% per annum. This leaves IDC in no doubt that there is a fundamental shift toward SaaS as a delivery mechanism, and its use within the notion of Web 2.0, and the convergence of SOA, Web 2.0, and SaaS.
What’s causing this shift? There are 5 primary drivers:
1. Purchasers believe th




















