I’ve just compiled an incomplete list of Web Services related resources:

Online Resources

• WS-Interoperability
  Have a look at the WS-I BP 1.0 and the corresponding testing tools. They are essential resources for building interoperable Web Services.
• WebServices.org
  A great site to keep yourself up-to-date with WS-* related stuff
• Web Services Developer Center on MSDN
  THE Microsoft site for information about Web Services
• Advanced Web Services on MSDN
  Great source of information about WS-* specifications. The articles are not rehashes of the specs but explain them in a non specy way…
• Designing Extensible, Versionable XML Formats on MSDN
  Have you ever thought XML versioning is easy? Read this article and you will suddenly realize that we’ll have to relay on advanced platforms if it comes down to versioning
• Web Services Enhancements (WSE) 2.0 on MSDN
  The WSE site contains download links as well as great articles
• Building Interoperable Web Services: WS-I Basic Profile 1.0 on MSDN
  An invaluable resource to create WS-I BP 1.0 compliant Web Services by using .NET 1.x
• W3C Web Services Activity
  That’s where you get all the nice specs from…
• …

Books on WS-*

• Web Services Architecture and its Specifications by Luis Felipe Cabrera & Chris Kurt
  A nice book explaining the driving forces and approaches of many WS-* specs in an easy way
• Understanding Web Services Specifications and the WSE by Jeannine Hall Gailey
  Similar to the one above but does it in the context of WSE

Tools

Events

• TechEd US and TechEd Europe
  If you want to get the latest news and updates on Web Services, TechEd is the place to be!