I used Joomla 1.5 a couple years ago and found it pretty easy to use. I created some tutorials for it, and it was a fairly easy-to-follow content management system, and since it's a free open-source application, that makes it even better.
You can go to this website for some free tutorials (see the demo's on the right side). Good luck. www.manualsfountain.com/contents/tmp-joomlalp/87/