<p>Can anyone explain to me how to get the visual state manager to work with a WPF application? It's just been added to the new wpftoolkit. I installed it as told, but even the sample doesn't show the VSM. In silverlight it work, but not in WPF. If installed the latest Blend 2 and updated with the SP1. </p>

Read these 2 articles on VSM in WPF:
http://dotnet.org.za/rudi/archive/2008/10/29/silverlight-love-for-wpf.aspx
http://windowsclient.net/wpf/wpf35/wpf-35sp1-toolkit-visual-state-manager-overview.aspx
Their is a registry setting that needs to be "turned on" for VSM in WPF support for blend... Read more
here