HTML-XAML Converter
In V1, we do not support HTML format in Editing. As such, when you copy from IE and pasting into WPF, we basically use the rtf format. However, theres some good news. :)
We do have a tool which enables this XAML-HTML scenario. The tool is available at:
http://wpf.netfx3.com/files/folders/developer/entry816.aspx