We're just working through a couple of final issues with the Windows Forms interface to Source Control. While on the topic, here are a few useful links on the subject:

• Host Secure, Lightweight Client-Side Controls in Microsoft Internet Explorer
  Great overview of how to host Windows Forms controls within the browser
• Configuring Internet Explorer Applications
  Using a configuration file referenced from the hosting page to define how the runtime treats the control
• Use the IEHost Log to Debug .NET Object Hosting in Internet Explorer
  How to find out what IE is (or is not) loading and where any failures are coming from
• Assembly Binding Log Viewer (Fuslogvw.exe)
  How to check which assembly versions are being loaded (especially useful when working through a caching proxy)