Team 2472 uses the Joomla CMS with several extensions, including a Facebook page stream. For the design, we bought and modified a template made by RocketTheme. It was a little tricky to learn at first, but the result is much better than anything that I could have done (at least, in my skill set) with HTML and CSS. Once you learn its in's and out's, Joomla is easy to work with, and allows team members to post content without needing an html editor, ftp, or coding knowledge. The WSIWYG editor is very nice, and it allows modification of the html, if needed. I would definitely recommend Joomla as a CMS.
Check out our website at
http://www.team2472.com