The next generation of open source content management, Joomla 1.5 is now available as a Release Candidate. This takes it one step closer to being a stable release.
A new set of forums have been created specially for 1.5.
http://forum.joomla.org/index.php/board,428.0.html General Questions
http://forum.joomla.org/index.php/board,430.0.html Migrating and upgrading
You can discuss more about the Joomla 1.5 Release Candidate in our forums.