Haven't been any huge changes in the recent past.  Factotum
and a lot of the security stuff happened 2 years ago. The earliest
deadline first scheduler has recently stabilized enough to depend
on.  Tools keep changing as people add features to them.  We base
the install on a new file system, fossil, last year.

We don't number releases at all since stuff changes everyday and
we cut a new installation image daily.  The latter is done
automaticly if anything has changed on the sources machine.
That machine is mountable by anyone using plan 9.