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.