Please vote for WS-ReliableMessaging if this is relevant to your enterprise web services

http://www-106.ibm.com/developerworks/library/ws-rm/

This specification (WS-ReliableMessaging) describes a protocol that allows messages to be delivered reliably between distributed applications in the presence of software component, system, or network failures. The updates are based upon the suggestions collected from the WS-ReliableMessaging Feedback Workshop held in July 2003 and the Interoperability Workshop help in October 2003. The protocol is described in this specification in an independent manner allowing it to be implemented using different network transport technologies. To support interoperable Web services, a SOAP binding is defined within this specification.

The protocol defined in this specification depends upon other Web services specifications for the identification of service endpoint addresses and policies. How these are identified and retrieved are detailed within those specifications and are out of scope for this document.