Contract First Development through Schema
Christian Weyer and Buddhike de Silva have an article in this month's MSDN magazine covering contract-first development with WCF. They go over modeling messages and services through schema and then applying that to build a web service with WCF. They also look at tooling for working with schemas including the WSCF Blue contract-first development tool that I mentioned a few months ago. Not entirely coincidentally, Christian has announced that WSCF Blue is now out of beta and the first version has been released.