And Darren is pointing everyone to Dan Wahlin's wonderful XML videos (and site):

Dan Wahlin's done it again... he's posted 4 excellent Windows Media movies that show a simple example for getting started with WSE

http://www.xmlforasp.net/codeSection.aspx?csID=81

In it learn how to:

  1. Wire-up WSE in your project
  2. Implement IPasswordProvider
  3. Check a web request for security tokens
  4. Make a web request with added security tokens

Dan is the man when it comes to XML and Web Services! If you haven't checked out the other samples on his site then I highly recommend it!