I just got done implementing NIS+ on a small testbed network at work.
This was primarily just for testing we're doing for compatibility with
A good source that I found for info on installing NIS+ on the web was
There's also Rick Ramsey's book, which I guess everyone recommends.
It's circa 1997, but I guess that tells you something about NIS+ :)...
My understanding is that NIS+ will be deprecated after Solaris 9 (I've
been reminded of this by a bunch of people, including our tech contacts
at Sun), so I guess the answer to your 1st question is probably "LDAP",
if you have the choice....