At this point I do not know of a maven repo for JBoss stuff. And unfortunatly, I think Maven has been instructed by the ASF to not put LGPL jars up on ibiblio. However, I think JBoss does need a Maven repo. I wonder if the JBoss guys can setup a jboss.sf.net/maven repo for us. That way SF pays for the bandwidth. I will volunteer to maintain it. :)
When I was testing out a hacked version of Greebo I setup a Maven-ish repo at http://jboss.sf.net/buildmagic/thirdparty so it is defs possible and quite simple to do too.
When/if JBoss ever uses Maven to build a repo will probs be setup here.