There are a number of blogs, discussion groups, podcasts, etc. talking about Service-oriented Architecture (SOA) and Service-oriented Integration (SOI). Instead of focusing on them individually, this blog focuses on using them together for better ROI results.
Service-oriented Integration (SOI) is the practice of using XML over HTTP (e.g. Web Services) to achieve interoperability between applications and services – for example, wrapping a legacy application function and exposing it to other applications, services, and business partners. Service-oriented architecture (SOA) encompasses architecture principles and best practices that guide the design and implementation of SOI, including methods that minimize coupling, complexity, and functional overlap. Most SOA initiatives start with the need to integrate an application; I believe the reason why companies fail and overspend on SOA initiatives is due to the lack of consideration for SOI and SOA together.