It's written in the Swordfish proposal that BPEL plug-in planned.
I'm from EILF project team and I working now on Apache ODE integration.
I've integrated Apache ODE as a bundled Web Service under Equinox HTTP
Services (Jetty) and now working on a connector interface for accessing
ODE via OSGi service.
It will be very interesting to read more about planned (or accomplished)
Swordfish BPEL plug-in and, maybe, to make some compatibility moves.