Heyas folks --I've been playing around a bit with Xorg on 4.0, and built some packages for Xorg from pkgsrc-2007Q4 that might be useful to someone else. Note that the server supposedly does not support SBus; I tested with a PCI ATI 3D Rage and GENERIC_SUN4U kernel.
ftp://ftp.invisible.ca/pub/NetBSD/packages/NetBSD-4.0/sparc Cheers, Jared