Remember when the Java vendors used to advocate WSRP as a way to accomplish Interop?
I never thought much of WSRP as a tool for implementing interop, and I went on the record with that.
Web services (without the RP add-on), and REST are what people are using for interop, and that really makes sense to me. I love it when I'm right. :)
PS: the WSRP FAQ on the OASIS website was last updated in 2004. *Yawn*.