Just in case anyone else tries to do this, I thought I'd give a heads 
up... I've been periodically building ISO images of 2.0_BETA/i386 and 
-current/i386 from a 2.0_BETA box, but since I rarely need to boot from 
them, I didn't notice until today that the images of -current I was 
building were NOT in fact bootable - the   A little investigation 
revealed that back in May, the concept of RELEASEMACHINE and 
RELEASEMACHINEDIR were added to bsd.own.mk in support of the Xen port, 
but since build.sh doesn't support building ISO images (yet), I'd been 
using the 'iso-image' target of src/etc/Makefile directly.  Since 2.0's 
bsd.own.mk has no RELEASEMACHINE, the flags to mkisofs don't contain the 
magic for i386 bootability.

I work around this by adding two lines to my /etc/mk.conf:

RELEASEMACHINE?=${MACHINE}
RELEASEMACHINEDIR?=${MACHINE}

...and it works as expected. 

(incidentally, if anyone's interested in using any of my ISO images, 
they're available for download at http://www.tastylime.net/netbsd/ .  No 
warranties of any kind!  :)

+j

-- 
Jeff Rizzo                                         riz@redcrowgroup.com
Red Crow Group LLC                                 http://www.redcrowgroup.com/
+1 415 550 0310