One of the features that got me so exited about ZFS at the beginning was snapshots, and the way they were implemented to save space. I thought, this is how backups should had always work. I also wondered ways to expose this potential and capabilities to users.
In the latest months, Erwann Chenede, from the desktop team here at Sun has been working on a Nautilus extension to take advantage of these features:
This feature will hit OpenSolaris 2008.11 due for November this year. In the meantime, check Erwann's post to figure out where the code is.
Big kudos to Erwann and everyone involved!