What’s The Best Way To Learn Cocoon?

I’ve got a few little projects in mind that I think Cocoon would be a good fit for and one system already in production that uses Cocoon (badly) so I’m thinking I need to work take some time and really learn how to use it properly and what the best practices are for using it.

So, oh great Cocoon guru’s who hangeth outeth at planet apache (and those who don’t), what’s the best way to go about learning Cocoon?  Book recommendations, article recommendations etc?  Where do I learn best practices and get a good overview of all the parts etc rather than just how to do specific things?