I managed to install the 20000620-1.5 snapshot on a Apple Network 
Server 700/150, with only minor problems:

Switching to serial console proved difficult because " ttya" is on the
port labeled "2" and " ttyb" is on port "1" - I still have to check if
this is a cable mix-up or a soft/firmware problem.

The install floppy fails to launch sysinst automatically because
'mount_kernfs' is not bound into the ramdiskbin:

ramdiskbin: mount_kernfs not compiled in
Usage: ramdiskbin <prog> <args> ..., where <prog> is one of:
[...]

The INSTALL kernel has the tlp(4) driver but GENERIC has de(4). I
built a new KERNEL with tlp(4) in place of de(4). 

I also changed the scsi driver from ncr to siop (out of habit - I have
been using it on i386 for some time) and the driver works as
advertised.

I think both changes (de->tlp and ncr->siop) should be made in the 
GENERIC kernel.

The boot messages follow. The tlp is a Apple 100baseTX add-in card, 
everything else is stock hardware. I will report on the mc0 Ethernet
adapter when I get dongle for interface.

NetBSD 1.5A (WALKER) #1: Fri Jun 23 12:43:09 EDT 2000
    root@walker.planix.com:/usr/src/sys/arch/macppc/compile/WALKER
CPU: 604 (Revision 303)
total memory = 49152 KB
avail memory = 40552 KB
using 640 buffers containing 2560 KB of memory
mainbus0 (root)
cpu0 at mainbus0
bandit0 at mainbus0
pci0 at bandit0 bus 0
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 11 function 0
pchb0: Apple Computer Bandit Host-PCI Bridge (rev. 0x03)
tlp0 at pci0 dev 13 function 0: DECchip 21140 Ethernet, pass 1.1
tlp0: broken MicroWire interface detected; setting SROM size to 1Kb
tlp0: interrupting at irq 23
tlp0: Ethernet address 00:05:02:00:01:40
tlp0: 10baseT, 100baseTX, 10baseT-FDX, 100baseTX-FDX
ofb0 at pci0 dev 15 function 0: Cirrus Logic CL-GD5430
ofb0: 640 x 480, 8bpp
wsdisplay0 at ofb0
obio0 at pci0 dev 16 function 0: addr 0xf3000000
esp0 at obio0 offset 0x10000 irq 12: NCR53C94, 25MHz, SCSI ID 7
scsibus0 at esp0: 8 targets, 8 luns per target
mc0 at obio0 offset 0x11000: irq 14,2,3: address 00:a0:40:25:6a:ea
zsc0 at obio0 offset 0x13000: irq 15,16
zstty0 at zsc0 channel 0 (console)
zstty1 at zsc0 channel 1
awacs at obio0 offset 0x14000 not configured
swim3 at obio0 offset 0x15000 not configured
adb0 at obio0 offset 0x16000 irq 18: 0 targets
aed0 at adb0 addr 0: ADB Event device
nvram0 at obio0 offset 0x1d000
lcd at obio0 offset 0x1c000 not configured
siop0 at pci0 dev 17 function 0: Symbios Logic 53c825a (fast wide scsi)
siop0: using on-board RAM
siop0: interrupting at irq 22
scsibus1 at siop0: 16 targets, 8 luns per target
siop1 at pci0 dev 18 function 0: Symbios Logic 53c825a (fast wide scsi)
siop1: using on-board RAM
siop1: interrupting at irq 26
scsibus2 at siop1: 16 targets, 8 luns per target
bandit1 at mainbus0
pci1 at bandit1 bus 1
pci1: i/o space, memory space enabled
pchb1 at pci1 dev 11 function 0
pchb1: Apple Computer Bandit Host-PCI Bridge (rev. 0x03)
scsibus0: waiting 2 seconds for devices to settle...
scsibus1: waiting 2 seconds for devices to settle...
siop0: target 0 using 8bit transfers
siop0: target 0 now synchronous at 10.0Mhz, offset 8
st0 at scsibus1 target 0 lun 0: <HP, C1533A, 9503> SCSI2 1/sequential removable
st0: drive empty
siop0: target 1 using 8bit transfers
siop0: target 1 now synchronous at 5.0Mhz, offset 8
cd0 at scsibus1 target 1 lun 0: <MATSHITA, CD-ROM CR-8005A, 4.0i> SCSI2 5/cdrom removable
siop0: target 2 using 16bit transfers
siop0: target 2 now synchronous at 10.0Mhz, offset 8
sd0 at scsibus1 target 2 lun 0: <SEAGATE, ST15150W_APL, 9503> SCSI2 0/direct fixed
sd0: 4095 MB, 3712 cyl, 21 head, 107 sec, 512 bytes/sect x 8388315 sectors
scsibus2: waiting 2 seconds for devices to settle...
IPsec: Initialized Security Association Processing.
boot device: sd0
root on sd0a dumps on sd0b
root file system type: ffs