I saw in the RoadMap that M4 was released on 22/06/2010, but I don´t see the Download of this version. When this version will be available?
It's not yet released. There's a discussion going on in jboss-dev mailing list about the pending items http://lists.jboss.org/pipermail/jboss-development/2010-July/016455.html. Keep an eye on the mailing list discussion(s) https://lists.jboss.org/mailman/listinfo/jboss-development