Yes, and thank you. Looks like Bernie (and I) will be editing the file
/etc/default/grub, and replacing the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

with

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

and then, running

sudo update-grub

to complete the job. I haven't tried that yet, myself, as I want to first
ensure that my 8.04 installation in another partition isn't adversely affected
by the "nomodeset".

I'll also add that "lshw" now reports the display as "UNCLAIMED", suggesting
that I'm using a generic driver. I can't set Visual Effects, and I'm probably
not going to see any acceleration from the Intel Integrated Graphics.

But that's a small price to pay to get a usable range of resolutions. I
couldn't do anything at all with 8.10 or 9.04 on this machine, and wouldn't have
attempted a 9.10 installation if I couldn't keep 8.04 in another partition.

I hope the Intel driver is better in 10.04, of course. But it looks like this
level of functionality is something I can live with.