diff --git a/README.md b/README.md
index 3fd88df..a04b020 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ make it easy to decrypt them when you need to view or edit them,
 and decrypt them for for use in production. Originally written
 for Puppet, now works with any Git or Mercurial repository.
 
+A slide presentation about an older release [is on SlideShare](http://www.slideshare.net/TomLimoncelli/the-blackbox-project-sfae).
 
 Overview
 ========