Here:

Official web site of the pFS project

The goal of this project is to create a database based file system,
and give an equivalent of the Oracle iFS system.
Among features we can already annouce are:
ACLs, UNIX standard user and group based permissions and extended permissions, native sharing of the files, ...

Want to participate to this project ?
Go to http://sourceforge.net and do a search with the word pFS.