Joomla (formerly Mambo), is set to release its latest, version 1.5 on October 12th, one year to the day that the Joomla team began coding it. Thirty-two "man-years" of work ($1.7 million in wages) have been put into Joomla's 1.5 release. Not bad. Joomla remains one of the most robust and comprehensive content management systems on the market, is open-source and free for the downloading. I have used Joomla and Mambo for a number of years, and though it has its quirks, that is generally due to your hosts problems, not the CMS itself. One good tip is to be sure that the host you use is Joomla friendly, or better yet, will install it for you via a one-click install process. It is safe to say that not many hosts will support the new version of Joomla, but that shouldn't stop you.