In WPF, you can create a ListBox with a Canvas as an ItemsPanel and position items on that canvas. The code to do that looks something like this:
<ListBox ItemsSource="{Binding}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=Name}"/>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<Canvas Width="200" Height="200"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="Canvas.Left" Value="{Binding Path=XPos}"/>
<Setter Property="Canvas.Top" Value="{Binding Path=YPos}"/>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
Can you do the same thing in a Silverlight2 ListBox, or preferably an ItemsControl?