I just put up a post at Between the Lines on the death of SOAP.

The challenge for the RESTful crowd is to create a well-thought out transport alternative to SOAP. HTTP is the basis for that transport, but it's not enough. The place to start is with service description and data binding so that RESTful Web services can enjoy the same kind of discovery that possible with SOAP. Paul Prescod made a start with his WRDL proposal, but it hasn't really taken off.

From » On the death of SOAP | Between the Lines
Referenced Fri Mar 25 2005 09:32:37 GMT-0700 (MST)

Update: A comment at Between the Lines mentioned Dave Orchard's WSDL 2.0 description of Yahoo! Search Web services.