Last week I was at the Jazoon conference and gave a presentation on Content Management with Apache Jackrabbit. It was a nice conference and I think my message was well received.
[slideshare id=73263&doc=content-management-with-apache-jackrabbit2120&w=425]
Lately I've been focusing more and more on JCR and content repositories as an "extended file system" instead of comparisons with relational databases or similar technologies. I find that if you see your content repository as a transactional, searchable, and observable file system with cool stuff like fine-grained content modeling capabilities, you end up with much better content models than if you think of the repository as a database with hierarchy as an added feature.