I just noticed that my 9th edition of Traffic Talk, titled Testing Snort with Metasploit, was posted. From the article:
Security and networking service providers are often asked whether their solutions are working as expected. Two years ago, I wrote How to test Snort, which concentrated on reasons for testing and ways to avoid doing poor testing. In this article, prompted by recent discussions among networking professionals, I show how to combine several tools in a scenario where I test Snort with Metasploit.