A couple years ago Roberto Salgado had the honor of presenting his research on SQL Injections at several conferences. Just recently, Blackhat released the video of his presentation. This post contains the link to Roberto's slides and video.
An overview of credmap, an open source penetration testing tool that automates the process of testing for credential reuse. It does so by testing supplied user credentials on known websites and verifies if the password has been reused on any of these.