$ cd /mnt
$ sudo apt-get install qemu-kvm kpartx
$ sudo mkdir mp dist x
$ sudo modprobe nbd
$ NBD=/dev/nbd0
$ DISTIMG=ubuntu-11.10-beta2-server-cloudimg-amd64-disk1.img
$ BUCKET="smoser-lp833783"
$ wget wget http://cloud-images.ubuntu.com/releases/oneiric/beta-2/$DISTIMG -O $DISTIMG
$ cloud-publish-image x86_64 $DISTIMG $BUCKET -v
$ qemu-img create -f qcow2 -b $DISTIMG tmpimg.img
$ sudo qemu-nbd -c $NBD tmpimg.img
$ sleep 2
$ sudo kpartx -a -v $NBD
$ sudo mount /dev/mapper/${NBD##*/}p1 mp
$ sudo cp mp/boot/initrd.img-*-virtual dist/
$ initrd=$(echo $PWD/dist/*-virtual)
$ ( cd x && zcat $initrd | sudo cpio -uid )
$ sudo vi x/scripts/init-bottom/udev # edit it
  # added the following before 'Stop udevd'
  # see https://launchpadlibrarian.net/80771881/udev-must-provide-console-833783.patch
  [ -e /dev/console ] || echo "ALERT! no /dev/console, going to udevadm settle"
  [ -e /dev/console ] || udevadm settle

$ ( cd x && find . -print0 | cpio --null -ov --format=newc | gzip -9 ) > initrd.new
$ sudo cp initrd.new /mnt/mp/boot/${initrd##*/}
$ sudo umount mp
$ sudo kpartx -d -v $NBD; sudo qemu-nbd -d $NBD
$ qemu-img convert -O qcow2 -c tmpimg.img "${DISTIMG%.img}-fix1.img"
$ cloud-publish-image x86_64 ${DISTIMG%.img}-fix1.img $BUCKET -v