Alexander Philippou sais

MSFT doesn't offer a Fast Infoset implementation. For WCF,
Fast Infoset is provided by Noemax's WCF-Xtensions.

I assume that general JBossWS<->WCF interop is given so we
just need to focus on trying Fast Infoset as message
encoding. This will also test content negotiation, which
again is provided only by WCF-Xtensions.

We have raised a test service, its wsdl is at
http://www.noemax.com:8080/BenchmarkService?wsdl. It will be
great if you can run a client to test it.