We already have a continuous integration process going where we build, run unit tests, do static code analysis and generate documentation. However, we would like expand this to include automatic security testing. In this case, we are working on a .NET web application, so I'm thinking there must be some XSS and SQLi scanners that is particularly good in a CI setting (invoked via command line for starters), and possible some static code analysis tools that are focused on security.
So, do you include automatic security testing as part of your CI? What do you test, and which tools do you use? What has your experience been like?