One of the things I've heard from people when I show them the Windows Communication Foundation (WCF) is that they would like some sort of "Service Designer" similar to the class designer inside of Visual Studio 2005, but that allows you to visually define your services.  Well, the next version of the Service Factory from patterns & practices will have such a designer.  You can learn more about it here.  I'm installing it right now and plan on lining up a webcast in the future to cover it.