One thing I've noticed over the last year is the continued lack of resources on detailed service design. There are plenty of resources geared at the architecture layer but very few geared toward the person actually doing the coding. I am hoping over the new few months to share some of my practical experience and pose some questions I still ponder on the details of service design. I'll also share some links on the Web that I have found to be useful.
If you do the actual design and implementation of services, please feel free to chime in with your own experiences. There is no one right way to do it. Good dialog on practices is always beneficial.
I'm in the middle of some major projects at work so I'm not sure when I'll get started. I want the content to be detailed and useful so it could take some time. In the meantime I'm very excited about the new book coming from Thomas Erl on Web Service Contract Design.