Jakob Haufe holds a talk about the Andrew File System (afs) right now. I’m currently looking for a possibility to replicate my personal data (like mail, feeds, cals but “usual files” as well) to several machines – if possible worldwide. AFS probably could be a solution, but frankly, it seems to be a bit of “overengineering” for this purpose.
The learning curve seems to be rather steep, and to top it, the authentication must be done via Kerberos.