We've just released MP1 for JBossESB 4.0 Beta 1. This is a minor update, fixing some of the out-of-the-box issues that the community reported. Check the release notes http://labs.jboss.com/file-access/default/members/jbossesb/downloads/4.0Beta1MP1/notes/release.txt to see what issues have been fixed.
One added feature is the support for FTP as a transport. Please remember that this is a Beta release, so handle with care and report back any problems you find, or additional feature requests.
You can download from the usual place http://labs.jboss.com/portal/jbossesb/downloads.