I was reading Linux Magazine UK (February 2003) and found the article on RSBAC interesting.
Some of the major security issues with Linux has been that of granular control of files/directories and discretionary access control (DAC). Additionally, there is an issue with having a "too powerful root user" (I've seen the old "rm -rf *" done by someone as root from / .. that's too dangerous). RSBAC seems to deal with these issues.
I was curious if anyone has tried it yet.