hi, there is a new article out on java.net about karma-jcr (which is an abstraction layer on top of Jackrabbit) for those of you who are interested. Jackrabbit is also mentioned in the article.
Developing Content-Driven Web Apps with karma-jcr http://today.java.net/pub/a/today/2005/09/29/content-driven-web-apps-with-karma.html cheers, oliver