start talking about polymer.dart

src/site/articles/web-ui/index.markdown

 ---
 layout: default
 title: "Web UI Package"
 rel:
   author: sigmund-cherem
 description: "Use web components and templates today with Dart. This brief
      introduction shows you how to use the features of tomorrow, today."
 has-permalinks: true
 article:
   written_on: 2012-10-01
@@ skipping 26 matching lines @@
 80%). The \{\% sample \%\} tag defines the width, height, and url for an iframe
 that will contain the running version of the code sample.
 
 {% endcomment %}
 
 {% codesampleSetup %}
 {% srcprefix https://github.com/dart-lang/web-ui/blob/master/example/explainer/ %}
 {% iframeprefix example/ %}
 {% endcodesampleSetup %}
 
+<div class="hero-unit">
+      <h1> Introducing Polymer.dart </h1>
+      <p markdown="1">
+        [Polymer.dart](/polymer-dart/), the next evolution of Web UI, has
+        better debugging,
+        faster development, and closer spec alignment.
+      </p>
+</div>
+
 # {{ page.title }}
 
+<aside class="alert alert-danger" markdown="1">
+<strong>Web UI is now Polymer.dart.</strong>
+Web UI has evolved to
+[Polymer.dart](/polymer-dart/), which provides many fixes and improvements.
+We encourage Web UI users to upgrade to Polymer.dart.
+The information on this page apply only to Web UI, which is now deprecated.
+</aside>
+
 _Written by Sigmund Cherem<br />
 October 2012 (Updated February 2013)_
 
 <div>
 <img src="dart_logo.png" width="69" height="70" alt="dart logo">
 <img src="webcomponent_logo.jpg" width="100" height="100" alt="web components logo">
 </div>
 
 
 The Web UI package (Web UI for short) provides web components, templates, data
@@ skipping 546 matching lines @@
 [project]: https://github.com/dart-lang/web-ui/
 [bugs]: https://github.com/dart-lang/web-ui/issues
 [backbone]: http://backbonejs.org/
 [angular]: http://angularjs.org/
 [ember]: http://emberjs.com/
 [todomvcindwc]: https://github.com/dart-lang/web-ui/tree/master/example/todomvc
 [watcher]: http://dart-lang.github.com/web-ui/docs/watcher.html
 [watcher.dispatch]: http://dart-lang.github.com/web-ui/docs/watcher.html#dispatch
 [group]: https://groups.google.com/a/dartlang.org/group/web-ui/topics
 [so]: http://stackoverflow.com/tags/dart