Recommended WPF Project Structure?

I'm a stickler for good Visual Studio Solution and Project structures.

I'm about to start a WPF proof of concept piece of work.

Can anyone recommend some WPF Project structures they have used and found worked well?

Here http://drwpf.com/blog/2007/10/01/58/

They have one recommendation which I like:

    Root
    - Pages
    - Controls
    - Resources
    App.xaml

Where Pages, Controls and Resources are folders.

Has anyone found certain structures work well / don't work well?

Also I'd rather not get into a 'Model View Presenter' discussion if that's ok with you guys.