Mitsuru Futura one of the author on my website Tech Head Brothers just released an awesome demo of what you can achieve with WPF; the WPF Book Control.
And as he is a kind guy he provides also the source code.
I still need to have some software installed but the main one needed to work are installed:
Michel Perfetti just released Fissum 0.4 with source code on Codeplex.
Fissum is a TFS Client it provides a direct access to your work items without opening the team explorer