The good news:

I finally managed to get NetBSD to recognize my network card with the
installation kernel.  Basically, I need to put the card in after the
system has booted.  If it's in the slot when I'm booting the kernel,
it won't see the card, but if I put it in the slot after the kernel has
booted, no problems.

The bad news:

I'm still getting the following after reinstalling:

wd0 at wdc1 channel 0 drive 0: <IBM-DMDM-10340>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 342 MB, 695 cyl, 16 head, 63 sec, 512 bytes/sect x 700560 sectors
boot device: wd0
root on wd0a dumps on wd0b
pcmcia0: card irq 3
pcmcia0: card irq 3
root file system type: msdos
warning: no /dev/console
init: not found
panic: no init
Stopped in pid 1 (init) at	0x80166e78:	jr	ra
		bdslot: nop
db>

And just so you don't think I've done something really stupid like
setting up wd0a as msdos, here's the disklabel (after booting off the
install kernel and dropping to the shell).

# /dev/wd0d:
type: unknown
disk: vale
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 695
total sectors: 700560
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0		# microseconds
track-to-track seek: 0	# microseconds
drivedata: 0 

8 partitions:
#        size   offset     fstype   [fsize bsize cpg/sgs]
  a:   637056    29232     4.2BSD     1024  8192    16   # (Cyl.   29 - 660)
  b:    34272   666288       swap                        # (Cyl.  661 - 694)
  c:   671328    29232     unused        0     0         # (Cyl.   29 - 694)
  d:   700560        0     unused        0     0         # (Cyl.    0 - 694)

FYI, it really doesn't appear to be a problem with the Microdrive itself.
I was able to install linux on the disk, boot off the linux kernel, and
mount the linux filesystem without any problems...  Unfortunately, linux
doesn't seem to support any form of suspend on the IBM z50 (in addition to
not supporting all the memory), so I'd really like to get NetBSD working,
if possible.

Any other ideas out there?

Adam