I wrote a kernel and security doc a while ago (it is a little raggedy, but certainly usable) for RedHat as well as Oracle. All of the optimizations and security stuff should be relevant.
Feel free to look at it. I will write an update when 2.4.x is stable enough to use, right now it is not ready for production (but almost).
It will include journalling and other goodies. Stay tuned.
The other one is : jongriffin.com/static