The JBoss Messaging project page is here. You can download any releases from there.
If you have any user questions please use our user forum
If you have development related questions, please use our development forum
Pop in and chat to us in our IRC channel
JBoss Messaging Subversion TRUNK is here
All our release tags are here
Red Hat kindly employs developers to work full time on JBoss Messaging, the motley crew are:
Tim Fox (project lead)