> Does anybody have a good source for a cheap (used?) 68040 that I
> can put in my Centris 610 so I can put NetBSD on that?  ;-)

You might try one of the NeXTstep Used equipment sites.  I've seen 25mhz
motherboards for cheep.  Just be shure to tell him you'll want to pull
the chip ( he might even do it for you) other wise you could get a
soldered-on-the-motherboard chip.

http://www.deepspacetech.com/

http://www.orb.com

Good luck

Gerald