http://www.composable.com/wsdc

The center features in-depth, informative articles on creating and consuming
web services, a daily wrap up of industry news, a rich resource guide containing
pointers to tools and technical information on the web as well as a discussion
forum for developers to exchange ideas and network within the community.

The WSDC is an invaluable resource for developers who working with SOAP,
XML-PRC or other XML based messaging systems.