Go get Hippo CMS 7 at http://www.onehippo.org, try out the distro and knock yourself out.
I need to thank so many people, that I wouldn't know where to start. Most of all, I need to thank "The Guys Upstairs" for all their hard coding in the last couple of months. Berry, Frank, Bart, Arthur, Ard and Auke, thank you. It's been a rocky ride but it was worth it. I also need to thank Niels, Rita, Jeroen, Jeroen, another Jeroen, Dennis, Jettro, Jasha, Ate, David, Woonsan, Vivek, Anton, Mathijs, Wouter, Tjeerd, Jeff&Jody, Ruben, Johan, Wander and Mike for their contributions. The "Guys Downstairs" (you know who you are!), folks in the US, the marketing people, our customers, everyone from Jackrabbit, Wicket, Maven, Lucene and everyone else who influenced this incredible new version of Hippo CMS.. Thanks.
Hippo CMS 7 was built on Apache Jackrabbit, Lucene, Wicket and many other Apache projects. Combine these really powerful components, add a little faceted navigation, a touch of plugin framework and 36 person years of development [1] and you have Hippo CMS 7 :-)
Oh, and it's open source. Go get our code from http://svn.onehippo.org/repos/hippo/hippo-ecm/, check out the Hello World example, and start your own plugin project at the Hippo Forge. The first 25 people to build a really neat plugin on the forge will receive one of those funky Hippo T-shirts. What's neat? A Google Maps location picker is neat, and maybe a Flickr image plugin is neat, too :)
If you have questions, or would like to share some feedback, feel free to sign up to our CMS 7 User list. Your comments are very well appreciated! :)
[1] Stats from Ohloh http://www.ohloh.net/p/hippoecm