I’ve pointed to Ceph before. It is an object storage file system, with lots of very nice features, current and planned. As a cluster file system, it has much going for it. Combined with btrfs, and a few other things, this could be a very exciting development. This is a good thing.
Stay tuned for more. We’ll have some basic testing up in a while. We’ll start at 2.6.34 to use the merged bits.