It seems that JINI is pretty much an abandoned project. The latest release from the Jini.org site is from last year, and there has been no news since then.
JINI appears
Web services becoming synonymous with SOA killed the buzz for Jini. Although Jini probably was a better fit for distributed computing as well as SOA at a intra-company/enterprise level, web services and the (highly misused) XML integration was pushed by the major software providers, primarily IBM. Of all the derivatives of RMI/Jini, Javaspaces seems to have survived somewhat. Rio was certainly a early version of Cloud computing, especially when it came to dynamic provisioning. I even wonder what happened to the promise of JXTA and its co-existence with Jini.
I guess radio killed the TV star in this case :(