What is unique about an SOA is that it's as much of a strategy as a set of technologies, and it's really more of a journey than a destination. Moreover, it's a notion that is dependent upon specific technologies or standards, such as Web services and interface technology, but really requires many different types of technologies and standards for a complete SOA. The types of technologies you employ are dependent upon your requirement.
Let's be a bit clearer as to where user interfaces fit into this SOA mix by providing core reference architecture, or, the basics of SOA.
