Oh yeah MP's have been around since the 603's. Most memorable:
DayStar Genisis MP: QUAD 604e 200MHz in 4 CPU daughtercards. And when
people like Sonnet and Crecendo released Dual CPU upgrade cards with
604's on them, There were a few people that had 16 604e's in the same
box running at 200MHz+!!! UMAX also released a machine based on the
same MB called the J700 IIRC. 
	As I was telling him privatly, BeOS is reputed to be the most 
efficient MP OS currently. I remember watching something on TV 
(think it was at MacWorld expo) of a BeBox (Dual 604 @ 200MHz?) playing
four 320x240 30fps movies simultaneously and still being able to 
interact with menu's/etc without dropping a single frame.
	If Apple would have worked with Be instead of NeXt, we probably
would have had something similar to OS X two years ago. Anyone who has
used Be can tell you how it makes any (non G3/G4) box SCREAM.

	Chris

Dan Winship wrote:
> 
> There are MP Power Macs? Wow...
> 
> Anyway, NetBSD doesn't usefully support multi-processor machines on
> any architecture. You should be able to use it as a single-processor
> machine, although I don't know for sure that this works.
> 
> -- Dan