Toby, a friend of mine, and Professor Trommler presentated the offline filesystem at “Chemnitzer Linux Tage (Germany)“.
The OFS (offline filesystem) is a offline-layer which is (or should be) able to extend every filesystem with offline capabilities. This means, that the user is able to work on his network documents, event when he is disconnected from the server. When connecten is restored, the filesystem automatically synchronizes the files.