Cherry G. Mathew has been working on a port of NetBSD to Intel's
64bit "IA64" platform
for some time now, see his
mailing list archive
for some more information. Talking about the mailing list, that one
is being migrated to the
port-ia64 NetBSD mailing list now.
More information on the port is available at
the port's homepage.
Check it out if you want to