There is a proposal
over on the Apache Web Services -WSFX Wikki for an implementation of WS-Coordination, WS-AtomicTransaction and WS-BusinessActivity.
From what I can tell this is from the same people who started the Sandesha project which is implementing WS-ReliableMessaging. They put an emphasis in their proposal to support interoperabillity. It would be good to see this get through, although I'm interested in reading the Architecture guide and the User guide more fully to see how easy this will be to use.
I guess the WS-* stack is moving forward whether you agree with it or not.