People associated with a local (Toronto) baseball club for youngsters and young adults have approached me with a view to replacing their existing web with a new site. What they'd like ideally is a wiki-style site or something like it — incorporating CMS and some database functionality.

I'm not sure if this is something I can undertake, but I've agreed to look into things for them. I'm hoping someone can suggest suitable tools etc. for me to investigate. A quick search just now turned up projectforum.com and centraldesktop.com. Or maybe I ought to be looking into Joomla? I'm just not sure how to make a start with this.

The current site is http://www.annettebaseball.com/. Suggestions, tips &c. greatly appreciated.