I needed something to test the changes to iso image creation, so I did a
snapshot - but this time including the XFree 4.3 stuff instead of the
old one we still use. So I'm not sure if this will work for you if you
try to use the Xserver - I can't test that. The rest of it, including client
X stuff, works just fine for me. Use at your own risk ;-)

The snapshot is available at:
ftp.netbsd.org:/pub/NetBSD/arch/sparc64/snapshot/20030307-1.6P-XF4.3

It includes an image for a bootable cd in the installation/cdrom subdirectory.

Martin