Current status as I understand it:

sun4m
	additional CPUs are recognized, but not supported (i.e. 
nothing except an idle loop will run on them). Works wonderfully on 
the first CPU.

sun4d
	unsupported architecture, though there was some interest 
expressed in it last fall; no reported progress since then (and I 
haven't seen any commits to the source tree that mentioned sun4d 
support).

Of course, we welcome your contributions if you can make progress on 
either of these two issues.

	Erik <fair@clock.org>