Yup, that's true.
Then I did a "koan --virt --server=servername --system=10.9.90.11"
Sure, IP's are fine too.
Even though koan has nothing to do with PXE, the requirement for
"--system" parameters to be resolveable to IP's or MAC's is grounded in
that.
So one or the other and you are good to go.
Maybe what I need to do is run a manual install with no kickstart file
and see what's in that anaconda.ks. I might be missing something still.
I'm pretty sure that's it. When you do find out, if you can, share
what you found -- somebody else might have the same problem.