There isn't currently a standard procedure for this, as far as I know. I created this wiki page a while back and I guess option 3 is what you want. http://wiki.jboss.org/wiki/Wiki.jsp?page=MavenThirdPartyJars
If you just want to deploy the existing jars from the ant repo, then you can just use the maven deploy plugin "mvn deploy:deploy-file" to deploy the jar, and generate a basic pom and metadata.
If you need to patch a new version that doesn't exist in the ant repository, then I think we can follow the same basic conventions that we do now. Just deploy the bin and source jars with a modified version number. Maybe we should have a separate jar in the repository that contains just the patches. So a structure something like this:
/oswego-concurrent/1.3.4-jboss/oswego-concurrent-1.3.4-jboss.jar .../oswego-concurrent-1.3.4-jboss-sources.jar .../oswego-concurrent-1.3.4-jboss-patch.jar