The Sonic message manager trac site is now publicly accessible at http://queuemanager.nl/trac. Anyone can now file a tickets and I request that everyone do so if you have a request of have found a bug.
Tickets can be submitted here: http://queuemanager.nl/trac/newticket.
The source code for message manager has always been available inside the jarfile, but this was never a very easy way to get the code for anyone. I have converted the subversion repository to mercurial in order to be able to publish it on the web site, history and all.
You may access the repository at http://queuemanager.nl/hg/ and clone it from the same URL. The project is also up on Ohloh here.
Over the past few weeks, everyone seems to want to install message manager offline (without using web start). To accomodate for this, I have documented the process for offline installation on the offline installation page.