Read about a customer experience on using JAX-WS RI on JBoss on the server side and JAX-WS runtime with Java SE 6 on the client side.
An important point to note in the article is the 1000% performance gains between EA and and more recent versions of JAX-WS. Not all of this gain may be due to JAX-WS 
Technorati: JAXWS JAX-WS JBoss Web services
