ZFS coolness

I just loaded 2008.05 open solaris on my laptop. Found that the
Broadcom wireless didn't get recognized (no surprise, linux doesn't
like it either, apparently Broadcom doesn't like anyone but
Microsoft). Anyways, found ndiswrapper, but apparently I require a
slightly newer kernel. So, how do I update? Well, I found this page:
http://opensolaris.org/os/project/indiana/resources/rn3/image-update/

What's really cool is that in OpenSolaris with ZFS, when you need to
do certain updates you essentially "branch" your filesystem, apply
changes to the branch (in those instructions earlier I was using build
86, so I had to do all of them), and then 'activate' that branch. The
old one is still there, and I could easily roll back if needed.
Imagine if you could do that after installing Vista. "Ah, crap, this
runs too slow. I need to rollback. ... ... Oh, what do you mean I
can't rollback? Ah, crap." Messing up a critical config file could (if
you use the beadm command religiously) be minor - just rollback. Think
Microsoft's Previous Versions for files and System Restore, but for an
entire filesystem, accessible from a bootdisk.

--
Chris Wiegand