In the last months I've been working with a really great team in the Service Factory project at Microsoft. This is a very ambitious project and in the first release you will find a collection of tools to develop web services using the architecture and best practices recommended by the patterns & practices group.
You can download it from the Web Service Software Factory home page and provide your feedback in the community workspace.
Next releases will include integration with .NET 3.0 technologies, like WCF and LINQ, so stay tuned and remember: this is just the beginning!