Soap over JMS is a very good idea, I think. But there need to be some work done on the productivity and connectivity, to be really useful. I would not dare to say that there is no future for Soap over JMS. But I think in most cases I would need the reliability over a very long distance... If you do indeed have the same requirement (reliable messaging over a long distance) I would suggest you take a look into the ebXML/ebMS standards. Oracle Integration B2B for example could help you with that.

OASIS is conducting a public review of the ebXML Messaging Transport Binding for Digital Signature Services version 1.0, which has been approved by the consortium's Digital Signature Services eXtended (DSS-X) Technical Committee as a Committee Draft. The specification defines an alternative transport binding for the DSS Core standard that uses the OASIS ebXML Messaging Service. This profile is compatible with ebMS 2.0 and 3.0. The public review is open from 30 May to 29 August 2008. OASIS seeks feedback from potential users, developers and all other interested parties.