I'm continually impressed by the quality of questions and answers that get posted to the JINI-USERS mailing list. To do my bit for the Community, I've created a Jini Wiki where I (and hopefully others) will actively post those nuggets.

I'm currently working on a way to integrate HyperGraph with SnipSnap to provide visual cues for navigating the Wiki.

P.S. Artima has links to other excellent Jini Books, FAQs, Web sites, articles, papers, and code examples.