[rules-users] High Performance Rules Environment

I would be interested in any feedback from users who have used / are using the JBoss Rules engine in a high performance environment. In order to justify the use of JBoss Rules / Drools, I need to be able to reference implementations that are using this rule engine in a production environment. The BRMS components that form part of release 4.0 allow it to be evaluated alongside Ilog Rules and Blaze Advisor; however, I really need some case studies that detail the numbers of facts and rules that are in production use, and any related stability issues. To date, I have come across the following links : http://legacy.drools.codehaus.org/Testimonies http://lists.jboss.org/pipermail/rules-users/2007-July/002097.html http://geekswithblogs.net/cyoung/articles/54022.aspx - Microsoft's Rule Engine Scalability Results - A comparison with Jess and Drools Does anybody know of any links to case studies, or performance /scalability tests? Thanks