Ran across this 1 today & thought I'd drop a mention here- I have noticed we have some pretty sharp teckies coming and going who may get a kick outta using or checking it out-
from their website @ : http://www.modsecurity.org/
The ModSecurity Development Team is pleased to announce the availability of ModSecurity 2.6.5 Release. The stability of this release should be good and it includes some bug fixes.
And from sourceforge @: http://sourceforge.net/projects/mod-security/?source=directory
ModSecurity is a web application firewall that can work either embedded or as a reverse proxy. It provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis.