Scroll PanoramaItem Header in 'wide' PanoramaItem - windows-phone-7

Question

I'm interested in creating my own 'Hub' Panorama. I've gotten the 'wide' PanoramaItem working, but I'm trying now to mimic the behavior seen in the Marketplace hub, where the PanoramaItem Header scrolls as you move across the hub.
I'm looking for a way for it to smoothly animate to the end of the hub. Has anyone tried this before, or have any suggestions?
I'd imagine it would be something like this:
//OnPanoramaViewChanged
//get X location of viewport
//animate title to X location
However it doesn't appear that the Panorama has a ScrollViewer attached property.
In case you're curious, here's how I made a wide panorama item.
<controls:PanoramaItem ScrollViewer.HorizontalScrollBarVisibility="Visible" Header="movies" Orientation="Horizontal" Width="900">
<controls:PanoramaItem.HeaderTemplate >
<DataTemplate >
<StackPanel>
<TextBlock Foreground="{StaticResource PanoramaHeaderBrush}" Text="{Binding}">
</TextBlock>
</StackPanel>
</DataTemplate>
</controls:PanoramaItem.HeaderTemplate>
<StackPanel>
<!-- line list with image placeholder and text wrapping -->
<ListBox ItemsSource="{Binding Items}" >
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.Template>
<ControlTemplate>
<ItemsPresenter />
</ControlTemplate>
</ListBox.Template>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="10">
<Grid Background="{StaticResource ControlTitlesInactivePivotBrush}" Width="173" Height="173" >
<TextBlock FontSize="24" Text="Movie Title (2010)" TextWrapping="Wrap" Style="{StaticResource PhoneTextGroupHeaderStyle}"/>
<Rectangle Fill="White" Height="48" Width="48" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="/Test;component/movie_icn.png" />
</Rectangle.OpacityMask>
</Rectangle>
</Grid>
<TextBlock Text="Movie Title:" Margin="12,0,12,0" Foreground="Black" />
<TextBlock Text="The Title" Margin="12,-6,12,0" Foreground="Gray"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</controls:PanoramaItem>

Answer 1

The Silverlight Panorama control doens't support the behaviour you're after or provide the ability to customize it in a way that will let you do it.
If you really want this then you'll need to build your own control from scratch. I would expect this to be more effort than is justified. Just avoid creating a very wide PanoramaItem instead.