So I set up a 200 mb root, 400 mb swap, and 600 mb usr partitions.
Continued through the woody install. Once apt got the initial list of
packages, it asked if I wanted to add another archive just in case. I
figures what the hell, sounds good to me. So I added a couple more.
I didn't do a full post-mortem, and I am assuming that it stuffed the
packages files in /var which probably got shoved in with root, but in
any case it sure filled whatever partition contained the package files
up to the very brim and overflowing.
Those additional archives cost you partition space you might not have,
so first-timers should maybe just stick with a single archive when apt
tries to talk you into some extras.
Not knowing exactly what installed and what failed I decided the
easiest course would be to just wipe the partitions and reinstall, and
the second time I skimped on those additional archives.
Now a happy Debian user with what I think is a clean install; the
floppy-based network install is pretty damn good imo.