I built the btrfs-tools package currently in testing for the etch-backports distribution, so it could be used on lenny as well. Longingly I am not able to upgrade to lenny just yet. It was quite simple. Let me know what people think. I'm finding it very useful to play/bench/shake-out btrfs w/o having to upgrade to testing. Cheers, a http://mentors.debian.net/debian/pool/main/b/btrfs-tools