Thanks to all who have tried to help. I hope to consolidate the thread here.
I have partially solved the automounting of usb 'scsi' mass storage
cameras, which is done by hal. No udev rules are necessary. No device
definitions are required. It's all already there. fstab-sync takes care
of creating mount points. /dev/sda and sda1 both appear when the camera
is plugged in; the necessary kernel modules are automatically loaded.
Furthermore, it all works...
If one is using gnome: plug in the camera and the filesystem on the
camera's memory chip will be automatically mounted to /media/usbdisk.
The problem is how to get this to happen under kde. Under kde, one has
to manually mount the camera. Isn't there a way to make this behave
under kde the way it is supposed to?