diff --git a/reference/mongo/mongocollection/ensureindex.xml b/reference/mongo/mongocollection/ensureindex.xml
index d9dcce1c9b..fc2bb80283 100644
--- a/reference/mongo/mongocollection/ensureindex.xml
+++ b/reference/mongo/mongocollection/ensureindex.xml
@@ -186,6 +186,24 @@ $collection->ensureIndex(array("username" => 1), array("unique" => 1, "dropDups"
  */
 $collection->insert(array("username" => "joeschmoe"));
 
+?>
+]]>
+   </programlisting>
+  </example>
+
+  <example>
+   <title>Geospatial Indexing</title>
+   <para>
+    Mongo supports geospatial indexes, which allow you to search for documents
+    near a given location or within a shape.  For example, to create a 
+    geospatial index on the "loc" field:
+   </para>
+   <programlisting role="php">
+<![CDATA[
+<?php
+
+$collection->ensureIndex(array("loc" => "2d"));
+
 ?>
 ]]>
    </programlisting>
@@ -195,7 +213,9 @@ $collection->insert(array("username" => "joeschmoe"));
  <refsect1 role="seealso">
   &reftitle.seealso;
   <para>
-   MongoDB core docs on <link xlink:href="&url.mongodb.dochub.indexes;">indexes</link>.
+   MongoDB core docs on 
+   <link xlink:href="&url.mongodb.dochub.indexes;">vanilla indexes</link> and 
+   <link xlink:href="&url.mongodb.dochub.geo;">geospatial indexes</link>.
   </para>
  </refsect1>
 
diff --git a/reference/mongo/updates.xml b/reference/mongo/updates.xml
index 52ead6501d..da7933ce21 100644
--- a/reference/mongo/updates.xml
+++ b/reference/mongo/updates.xml
@@ -52,6 +52,27 @@ $blog->update($criteria, array('$set' => array("comments.1" => array("author" =>
    </programlisting>
   </para>
  </section>
+
+ <section>
+  <title>The Positional Operator</title>
+  <para>
+   The positional operator <literal>$</literal> is useful for updating objects 
+   that are in arrays.  In the example above, for instance, suppose that we did
+   not know the index of the comment that we needed to change, merely that we
+   needed to change "John" to "Jim".  We can use <literal>$</literal> to do so.
+  </para>
+  <programlisting role="php">
+<![CDATA[
+<?php
+
+$blog->update(
+    array("comments.author" => "John"), 
+    array('$set' => array('comments.$.author' => "Jim")));
+
+?>
+]]>
+  </programlisting>
+ </section>
 </section>
 
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