Amon Ott has released another version of RSBAC, for 2.1.115 now.
http://agn-www.informatik.uni-hamburg.de/people/1ott/rsbac/eng.htm
You get the following security modules:
MAC  Bell-LaPadula Mandatory Access Control (no compartements yet) 
CWI  Clark-Wilson-Integrity (only basics implemented) 
FC   Functional Control. A simple role based model
SIM  Security Information Modification
PM   Privacy Model. Simone Fischer-Hubner's Privacy Model
MS   Malware Scan
He uses a /rsbac directory for his database, so you don't have to
worry about ext2 hacks. That could come later.