diff --git a/README.textile b/README.textile
index 3265006..ac5be37 100644
--- a/README.textile
+++ b/README.textile
@@ -13,5 +13,7 @@ Otherwise, the slide deck itself is licensed
 
 <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/us/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/us/88x31.png" /></a><br /><span xmlns:dc="http://purl.org/dc/elements/1.1/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dc:title" rel="dc:type">Unicode for Smarties</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/us/">Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License</a>.
 
+The presentation is implemented using Eric Meer's beautiful "S5":http://meyerweb.com/eric/tools/s5/ system.
+
 Jonathan Feinberg
 jdf@us.ibm.com