The WS-I.org published a demo application showing Web services interoperability between different vendors.
A first draft of the WS-I Sample Application is now available. Sample web service implementations from ten vendors and on a variety of platforms may be downloaded for review. These drafts have been submitted for approval by the WS-I Board, and are currently in their final review cycle.
If you like to see this Supply Chain Sample Applications demo, check out the WS-I.org website. Companies participating include BEA Systems, Bowstreet, Corillian, IBM, Microsoft, Novell, Oracle, Quovadx, SAP, and Sun Microsystems.
Read: WS-I demos interoperability "not only on paper"