We have just released the third milestone release of 4.2, which is now available for download from the labs page (http://labs.jboss.com/jbossesb/downloads).
We have made a lot of changes in the last seven weeks, as can be seen in the release notes (http://labs.jboss.com/file-access/default/members/jbossesb/downloads/4.2MR3/notes/release.txt), and are now in a good position for the GA release.
Please download this release and let us know if you have any issues. As always we will do our very best to resolve anything which comes up.
It's worth adding to what Kevin has just said and point out that it is unlikely there will be any further MR releases between now and the GA release.