I released an update to my WPF NotifyIcon, which fixes two issues:

• Interactive Popups should now fully support all control types.
• The control can now be used in Windows Forms projects, if you need more functionality than the built-in component.

The solution now comes with an additional WinForms sample project, which shows how to display a WPF user control as an interactive popup.

Download link and further information can be found on the control’s home page:
http://www.hardcodet.net/wpf-notifyicon