I got a call a last week from Dave, a consultant in our financial services group and someone I've not seen or heard from in quite a long time.  His challenge?  He's working with a customer who wants to use Tibco EMS to move SOAP messages between .NET clients and J2EE servers.  Simon and I have tackled this challenge, both for MQSeries and MSMQ.  I promised Dave that he'd have a solution working in four-to-five days and pointed him to Simon's MQSeries transport on GotDotNet.  Dave and I spoke again at length last Friday, and then again yesterday and wouldn't you know that within four days, he is sending and receiving SOAP messages over Tibco EMS!