I was discussing SOA implementation with a friend of mine this morning and he told me about the architecure that he is using to develop his application.And then I told him about how/what I think of SOA i.e. message oriented communicaiton,loose coupling, find/bind and exucute logic. He reffered me Microsoft reference architecure at GotDotNet based on SOA. SOA is really some thing that promises loosely coupled computing.Here it is a defination for SOA.