Vista - How do I use toolbox controls in VS2005 Orcas?

I've got Windows SDK, Orcas and .NET Framework 3.0 installed (all
downloaded today - 3 Oct 2006, so Sept CTP), and it all seems to be
working fine.

I've got a Hello World application running using XAMLPad (thanks to a
third party site - MSDN is no help at all - as usual it's all theory
and sales pitch and no practical examples). Intellisense works fine in
VS2005.

What is puzzling me is how to use the VS2005 toolbox with the fancy new
XAML controls.
I have all the new controls available, but it seems I am only able to
drag a single control onto the designer area. If I drag some sort of
container control, I then can't drag anything else. Double clicking
seems to work better than dragging, but this replaces the last control
I added.
Also, why does the toolbar become unavailable when I'm in the code
pane? It works with standard .NET controls.

Is this functionality complete? It doesn't appear so when compared to
drag and drop of controls in standard Visual Studio application.

Any light which can be shed on this will be much appreciated.