Now, all it's doing is grabbing kstats, so it wasn't much of a stretch to put together a new version of JKstat that has a new demo to display the ZFS cache statistics. Try
(Requires OpenSolaris, Solaris Nevada, or Solaris 10 8/07 or later to actually have the kstats to display.)
This release of JKstat is a bit rough, as there are a few other things I was working on that aren't neatly finished off yet, but I thought it worth putting out just for the arcstat demo - any comments and suggestions for improvement would be gratefully appreciated!
So, download JKstat now - and here's a little snapshot of the new demo: