Windows Forms to XAML Converter (WF2XAML) is a tool to convert Windows Forms to WPF/Silverlight/Windows Phone XAML. It is based on template concept and can be fully extended to support third party controls and to render custom XAML.
You can apply Styles during conversion simply creating your templates and inserting them in the application config section.
Feel free to contact me to comment the tool and for reporting your usage impressions.