Index: includes/plugins.inc
===================================================================
--- includes/plugins.inc	(revision 2)
+++ includes/plugins.inc	(working copy)
@@ -80,6 +80,7 @@
         'handler' => 'views_plugin_style_default',
         'theme' => 'views_view_unformatted',
         'uses row plugin' => TRUE,
+        'uses options' => TRUE,
         'type' => 'normal',
       ),
       'list' => array(
@@ -2421,8 +2422,28 @@
   /**
    * Static member function to set default options.
    */
-  function options(&$options) { }
+  function options(&$options) { 
+    $options['grouping'] = '';
+  }
 
+  function options_form(&$form, &$form_state) {
+    // Only fields-based rows can handle 
+    
+    if (!empty($this->row_plugin->definition['uses fields'])) {
+      $options = array('' => t('<None>'));
+      foreach ($this->display->handler->get_option('fields') as $field) {
+        $options[$field['table'] . '_' . $field['id']] = $field['label'];
+      }
+      $form['grouping'] = array(
+        '#type' => 'select',
+        '#title' => t('Grouping field'),
+        '#options' => $options,
+        '#default_value' => $this->options['grouping'],
+        '#description' => t('You may optionally specify a field by which to group the records.  Leave blank to not group.'),
+      );
+    }
+  }
+  
   /**
    * Called by the view builder to see if this style handler wants to
    * interfere with the sorts. If so it should build; if it returns
@@ -2441,11 +2462,30 @@
       vpr('views_plugin_style_default: Missing row plugin');
       return;
     }
-    $rows = array();
-    foreach ($this->view->result as $row) {
-      $rows[] = $this->row_plugin->render($row);
+    
+    // Group the rows according to the grouping field, if specified.
+    $sets = array();
+    if ($this->options['grouping']) {
+      foreach ($this->view->result as $row) {
+        // @todo: Group on the rendered version of the field, not the raw.
+        $sets[$row->{$this->options['grouping']}][] = $row;
+      }
     }
-    return theme($this->theme_functions(), $this->view, $this->options, $rows);
+    else {
+      $sets[''] = $this->view->result;
+    }
+    
+    // Render each group separately and concatenate.  Plugins may override this
+    // method if they wish some other way of handling grouping.
+    $output = '';
+    foreach ($sets as $title => $records) {
+      $rows = array();
+      foreach ($records as $label => $row) {
+        $rows[] = $this->row_plugin->render($row);
+      }
+      $output .= theme($this->theme_functions(), $this->view, $this->options, $rows, $title);
+    }
+    return $output;
   }
 
   function validate() {
@@ -2465,19 +2505,28 @@
  * decorations.
  */
 class views_plugin_style_default extends views_plugin_style {
+  /**
+   * Set default options
+   */
+  function options(&$options) {
+    parent::options($options);
+  }
+
   function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
     // @todo -- separator option
   }
 }
 
 /**
- * Style plugin to render each item in an ordered or unordered list
+ * Style plugin to render each item in an ordered or unordered list.
  */
 class views_plugin_style_list extends views_plugin_style {
   /**
    * Set default options
    */
   function options(&$options) {
+    parent::options($options);
     $options['type'] = 'ul';
   }
 
@@ -2485,6 +2534,7 @@
    * Render the given style.
    */
   function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
     $form['type'] = array(
       '#type' => 'radios',
       '#title' => t('List type'),
@@ -2502,6 +2552,7 @@
    * Set default options
    */
   function options(&$options) {
+    parent::options($options);
     $options['columns'] = 4;
     $options['alignment'] = 'horizontal';
   }
@@ -2510,6 +2561,7 @@
    * Render the given style.
    */
   function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
     $form['columns'] = array(
       '#type' => 'textfield',
       '#title' => t('Number of columns'),
@@ -2533,6 +2585,7 @@
    * Set default options
    */
   function options(&$options) {
+    parent::options($options);
     $options['columns'] = array();
     $options['default'] = '';
     $options['info'] = array();
@@ -2633,6 +2686,7 @@
    * Render the given style.
    */
   function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
     $fields = $this->display->handler->get_option('fields');
     if (empty($fields)) {
       $form['error_markup'] = array(
@@ -2753,7 +2807,21 @@
    * Render the table style.
    */
   function render() {
-    return theme($this->theme_functions(), $this->view, $this->options, array());
+    $sets = array();
+    if ($this->options['grouping']) {
+      foreach ($this->view->result as $row) {
+        $sets[$row->{$this->options['grouping']}][] = $row;
+      }
+    }
+    else {
+      $sets[''] = $this->view->result;
+    }
+
+    $output = '';
+    foreach ($sets as $title => $records) {
+      $output .= theme($this->theme_functions(), $this->view, $this->options, $records, $title);
+    }
+    return $output;
   }
 }
 
Index: theme/theme.inc
===================================================================
--- theme/theme.inc	(revision 2)
+++ theme/theme.inc	(working copy)
@@ -187,7 +187,10 @@
  */
 function template_preprocess_views_view_table(&$vars) {
   $view     = $vars['view'];
-  $result   = $view->result;
+  $result   = $vars['rows'];
+  // We're going to rebuild this variable below, but need to empty it first.
+  $vars['rows'] = array();
+
   $options  = $view->style_handler->options;
   $handler  = $view->style_handler;
 
@@ -201,7 +204,7 @@
   if ($query) {
     $query = '&' . $query;
   }
-
+  
   foreach ($columns as $field => $column) {
     // render the header labels
     if ($field == $column) {
Index: theme/views-view-list.tpl.php
===================================================================
--- theme/views-view-list.tpl.php	(revision 2)
+++ theme/views-view-list.tpl.php	(working copy)
@@ -4,11 +4,15 @@
  * @file views-view-list.tpl.php
  * Default simple view template to display a list of rows.
  *
+ * - $title : The title of this group of rows.  May be empty.
  * - $options['type'] will either be ul or ol.
  * @ingroup views_templates
  */
 ?>
 <div class="item-list">
+  <?php if (!empty($title)) : ?>
+    <h3><?php print $title; ?></h3>
+  <?php endif; ?>
   <<?php print $options['type']; ?>>
     <?php foreach ($rows as $row): ?>
       <li><?php print $row ?></li>
Index: theme/views-view-table.tpl.php
===================================================================
--- theme/views-view-table.tpl.php	(revision 2)
+++ theme/views-view-table.tpl.php	(working copy)
@@ -4,6 +4,7 @@
  * @file views-view-table.tpl.php
  * Template to display a view as a table.
  *
+ * - $title : The title of this group of rows.  May be empty.
  * - $header: An array of header labels keyed by field id.
  * - $fields: An array of CSS IDs to use for each field id.
  * - $rows: An array of row items. Each row is an array of content
@@ -12,6 +13,9 @@
  */
 ?>
 <table>
+  <?php if (!empty($title)) : ?>
+    <caption><?php print $title; ?></caption>
+  <?php endif; ?>
   <thead>
     <tr>
       <?php foreach ($header as $field => $label): ?>
Index: theme/views-view-unformatted.tpl.php
===================================================================
--- theme/views-view-unformatted.tpl.php	(revision 2)
+++ theme/views-view-unformatted.tpl.php	(working copy)
@@ -7,6 +7,9 @@
  * @ingroup views_templates
  */
 ?>
+<?php if (!empty($title)) : ?>
+  <h3><?php print $title; ?></h3>
+<?php endif; ?>
 <?php foreach ($rows as $row): ?>
   <?php print $row ?>
 <?php endforeach; ?>
\ No newline at end of file
Index: views.module
===================================================================
--- views.module	(revision 2)
+++ views.module	(working copy)
@@ -29,7 +29,7 @@
 
   $arguments = array(
     'display' => array('view' => NULL),
-    'style' => array('view' => NULL, 'options' => NULL, 'rows' => NULL),
+    'style' => array('view' => NULL, 'options' => NULL, 'rows' => NULL, 'title' => NULL),
     'row' => array('view' => NULL, 'options' => NULL, 'row' => NULL),
   );