YES:
 * Specifying rootfs location filesystem type
 * Configuration examples, HOWTOs
 * DNS configuration.
 * {pre,post}_hooks for some phases.

MAYBE:
 * Change the rootfs_part= argument handling, so that it would accept arbitrary
    ammount of transformations; will lead to awesome stuff like transforming
    next parts using scripts downloaded in previous parts.
    Might actually work now, but didn't test it yet.
 * Compression algorithm autodetection based on filename OR bsdtar automagic
 * Fancier OK/FAIL - at the end of the line, or somewhere
 * A proper vim modeline for the initramfs/init script.
 * https. But wget in busybox doesn't and won't support it.
    http://lists.busybox.net/pipermail/busybox-cvs/2005-April/019949.html
 * A proper buildsystem.
  * Making pv optional.
  * Optional bsdtar.
  * Optional curl, for https and other uri types.
  * Fallback sshd.
   * Kernel parameter for accepted-by-default ssh keys

DONE:
 * Downloading rootfs over http
 * Other compression algorithms
 * Rootfs "overlays"/"parts"
 * Start different init than /sbin/init