As a registered member of SearchSOA.com, you're entitled to a complimentary copy of An Implementor's Guide to Service Oriented Architecture: Getting It Right written by David Besemer, Paul Butterworth, Luc Clément, Jim Green, Hemant Ramachandra, Jeff Schneider, and Hub Vandervoort and published by Westminster Promotions. " Designing services" focuses on Web service implementation issues and standards.
There are a number of implementation issues 'above' the standards. In this chapter, several of these are discussed, including topics like designing for reuse and error handling. You may or may not elect to follow the recommendations, but the issues discussed are important and should receive careful attention. If you are an application developer or a service author, this is the most important chapter for you.