Gatesgarth64
edison-image-91c85a58.7z contains a 64 bit image in ext4 and btrfs, ready for flashing with the supplied flashall.sh (flashall.bat has not been updated, we will accept patches for that). Once you flash the btrfs image you can send btrfs 'snapshots' containing a 2nd image. edison-image-edison.snapshot.7z has an example of that. See https://edison-fw.github.io/meta-intel-edison/6.2-Transferring-a-new-btrfs-image.html
bullseye-image-edison.snapshot.7z contains a btrfs snapshot that you can manually send/receive on the file system and boot, see https://edison-fw.github.io/meta-intel-edison/6.2-Transferring-a-new-btrfs-image.html. To password for user root is 'root'.
Release notes: https://edison-fw.github.io/meta-intel-edison/0.6-News.html