Added link to Dave Burns' sane-devel post.

unsupported/canon-fs4000.html

@@ -69,6 +69,10 @@ WPE04020 *or* WPD4020 (not sure)
 </pre>
 
     <h2>Comments</h2>
+    <p>
+      <a
+	href="http://lists.alioth.debian.org/pipermail/sane-devel/2004-June/011304.html">Dave Burns</a> is trying to write a backend for that scanner.
+    </p>
     <p>
       <a href="mailto:eric.bachard@free.fr">Eric Bachard</a> is interested in
       getting this scanner supported. He provides more details about it in