To my knowledge No memory card comes with the D70, unless its dealer
supplied. Lexar and San Disk are the two most popular makes, 512mb cards
are always ideal if you want all the card contents to fit on a single
CD.

The D70 will automatically tell you how many shots you have left, based on
resolution and compression settings.  Put any card in there and do a little
math to tell you how many more, or less images you can get on a different
size card.  I like Sandisk cards, and have two 512MB cards.  It all depends
on how much you shoot at one session as to what size you should get.

    If it is like my D70, the answer is zero.  Nikon does not supply
a CF card with the camera, though some dealers may opt to do so.

    Still zero -- until you specify a size of card which you
separately purchase for the camera. :-)

    Note that your "highest resolution and lowest compression" has
two possible answers, depending on whether you are willing to consider
RAW (NEF) images, or whether you intend to have the camera produce
JPEGs.

    I'll pop a clear 1GB card into the camera, and read off what it
claims.  Beware, though, that the camera's estimate is pessimistic for
the JPEGs at least.  As an example, at the "Medium/Fine" setting (the
only one with which I have actually *filled* a CF card, the camera
predicts that it will be able to put 522 images on a 1GB CF card, and in
reality, I was able to get 705 images before I had to switch to the
spare card.  This will, of course, vary somewhat with how compressible
the particular images are, but you can safely bet that you will get at
least the number that the camera predicts. (I *did* say that its
predictions were on the pessimistic side. :-)

    The estimate for the RAW (NEF) images used to be more
pessimistic, until the new relase of firmware for the D70 (to match the
firmware for the D70s).

    So -- all figures for a 1GB CF card:

    NEF(RAW)    179
    Large/Fine    293
    Medium/Fine    522 (camera claimed, actual experience was 705 images)
    Small/Fine    1.1K

I won't bother with listing the Norm and Basic levels of JPEG
compression.

    I have two 1GB Lexar "Professional 80X" cards.  I have *once*
filled one completely (a long weekend out of town, with lots of fall
foliage to shoot on the way, plus a wedding and an after-wedding
get-together, and more foliage (and rock formations) on the way back
home.

    FWIW -- I also had to swap batteries at about the 620 shot
level.  About half of my exposures had been with flash, so that should
be taken into account when deciding on a spare battery for the camera.
If you have two, make sure that you use one until it shows a noticeably
low charge, and then swap in the other, instead of popping each battery
in the charger, even if it is not particularly low.  The batteries will
last through more charge cycles that way.

    Enjoy,
        DoN.

Zero.

Figure around 6MB/per photo in raw mode, 3MB for JPG.

The 2GB CF cards are the sweet-spot now, I just picked up a 50x 2GB
Kingston CF card for $100 (with no damn rebates!). A 2GB card would hold
about 667 JPG images, or 333 RAW images.