Just for fun, I built and booted 3.0_BETA on the dreamcast.

I still have to test a patch to see if I can get it building on my
amd64 machine, but this time I built it from a 2.0.2 i386 machine.

Here's the dmesg:

dreamcast# dmesg
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 3.0_BETA (GENERIC.NB) #0: Sun Oct 23 09:39:41 MST 2005
        root@foghorn:/usr/obj-dreamcast-r3/sys/arch/dreamcast/compile/GENER=
IC.NB
SEGA Dreamcast
total memory =3D 16384 KB
avail memory =3D 14288 KB
mainbus0 (root)
cpu0 at mainbus0: HITACHI SH4 199.600MHz PCLOCK 49.900 MHz
8KB/32B direct-mapped Instruction cache.
16KB/32B direct-mapped Data cache.
P0, U0, P3 write-through P1 write-through
full-associative 4 ITLB, 64 UTLB entries
multiple virtual storage mode, SQ access: kernel, wired 61
shb0 at mainbus0
scif0 at shb0
maple0 at shb0: SH4 IRL 9
pvr0 at shb0: 640 x 480, 16bpp, NTSC, composite
wsdisplay0 at pvr0 kbdmux 1: console (80x30, vt100 emulation)
wsmux1: connecting to wsdisplay0
gdrom0 at shb0: SH4 IRL 9
g2bus0 at shb0
gapspci0 at g2bus0: SEGA GAPS PCI Bridge
pci0 at gapspci0 bus 0
pci0: memory space enabled
rtk0 at pci0 dev 0 function 0: SEGA Broadband Adapter
rtk0: interrupting at SH4 IRL 11
rtk0: Ethernet address 00:d0:f1:02:89:7f
ukphy0 at rtk0 phy 7: Generic IEEE 802.3u media interface
ukphy0: OUI 0x000000, model 0x0000, rev. 0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
aica0 at g2bus0: ARM7 Sound Processing Unit
aica0: interrupting at SH4 IRL 9
audio0 at aica0: half duplex
root on rtk0
nfs_boot: trying DHCP/BOOTP

Glad to see it still boots after all this time.