Thinktecture has released version 0.6 of their Web Services Contract-First tool. It is the Visual Studio 2005/.NET 2.0 version of their WCSF add-in for Visual Studio. It also features a command-line version.
Contract First is the best approach to design and develop web services whenever interoperability matters.
You can find more information about this excellent tool and download it from thinktecture's web site.