Awhile back I provided some links for information on ext4 the new update to ext3. Of course ext4 is in no the end to new formats. Oracle has been working on Btrfs (Butter FS) for a bit now and its in the latest Linux kernel as unstable. Now many people have still never heard of Btrfs but it is a very interesting file system that is able to do pretty much everything ZFS does and more. I am personally really excited for Btrfs as it is promising to be faster and more resilient then ext4. For more information about Btrfs and some interesting benchmarks follow the link provided.
Links:
Alpha's Place 