"Binding" to ListBoxItem's IsSelected property from its template in Silverlight

It is not really a binding, but it does the trick:

<ListBox Name="MyListBox" ItemContainerStyle="{StaticResource MyListBoxItemStyle}" >

<Style x:Key="MyListBoxItemStyle" TargetType="ListBoxItem">
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ListBoxItem">
        <Border Name="Border" Padding="2" Loaded="Template_Loaded">                                    
          <ContentPresenter />
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

private void Template_Loaded(object sender, RoutedEventArgs e)
{
  Border border = (Border)sender;
  ListBoxItem listBoxItem = (ListBoxItem)VisualTreeHelper.GetParent(border);
  
  MyListBox.SelectionChanged +=
    // this will be executed for every item whenever selection changes
    delegate(object s1, SelectionChangedEventArgs e1)
    {
      if (listBoxItem.IsSelected)
      {
        // do stuff to "border" or "listBoxItem"
      } 
      else
      {
        ...
      }
    };
}