As I recently threatened, SearchWebServices.com has now put together an SOA Lifecycle All-in-One Guide. We have done so with the hope that, by understanding the service lifecycle, IT professionals won't find service-oriented architecture such an arcane notion.
It is also designed to serve as a resource for those of you who do understand SOA and have one underway. As we all know, an SOA implementation can be an involved process and this All-in-One Guide will help you to organize your departmental and technical resources.
It starts with a chapter on SOA fundamentals. Service-orientation principles and a description of the SOA lifecycle are included along with planning resources and explanations of how to achieve and pitch ROI for SOA projects.