Question for everyone out in LJ land. Have any recommendations for a website Content Management System?

I need something for non-techies to edit content with a WYSIWYG interface... text, images, tables, etc. Open Source preferred, but not required. I'm not worried so much about page style, navigation and things of that nature. Just the content itself.

I'm looking at open source CMS systems right now, but I really haven't used any. The only thing I've actually looked at so far is Joomla (but that was only for about 20 minutes). I'm not too optimistic about finding something that is at the ease-of-use level that I'm looking for.