It's using Metro 1.1.
Metro is based on some components, including JAXWS, JAXB and WSIT. The versions being used in JBossWS-Metro can be found in the main pom.xml. We'll make this more clear in the release note anyway, thanks for the suggestion.
Which version of Metro is JBossWs-Metro 3.0.4 using?
JBossWS-Metro 3.0.4.GA was still using Metro 1.1.
The upcoming JBossWS-Metro 3.0.5.GA will be almost based on Metro 1.3.1 instead. See here for further details: http://www.jboss.com/index.html?module=bb&op=viewtopic&t=144914