WS-AT interop between WAS and WCF

Anyone who has ever tried to set up interoperable WS-AtomcTransaction interop between WAS and WCF will know its easy once you have figured out how to configure the WS-AT service endpoints in both systems to use SSL with mutual certificate authentication. If you haven't got that far yet and don't want to have to figure this out for yourself, read Billy Lo's paper on Building transactional Web services with WebSphere Application Server and Microsoft .NET using WS-AtomicTransaction