One of the frustrations with the current WCF tooling is that, although I can generate the client proxy code from a WSDL document I cannot generate the server side skeleton that matches the WSDL. In situations where two parties agree a contract based on WSDL this makes implementing the service side error prone. Back in the ASMX days WSDL.EXE had a /s switch that would create the service side skeleton, but this feature was not carried through into SVCUTIL.EXE.

Fortunately the WSCF (Web Service Contract First) guys  have finally released a beta of a WCF compatible version of their tool that allows you to build up a model of the service and then generate the client and/or service

Here’s Santosh’s announcement