>I wish to run a few X apps via ssh from a headless computer. Simply trying 
>to ssh with -X produces an error to the effect that a variable is not 
>defined. This makes perfect sense, something must be running to give it a 
>socket name. "0:0" etc.
>
>What packages, services are minimaly required to run such a gtk app 
>remotely. What docs have been written on this?

My experience with GTK apps is that you need to use the -Y option that
newer versions of SSH require to enable trusted forwarding.  (This is
applicable to the version of SSH shipped with NetBSD >= 3.0.)  SSH had
its X11 forwarding security tightened up a few releases back.

Hope this helps,

Dave