Debugger Canvas is a new user experience for the debugger in Visual Studio Ultimate. It pulls together the code you’re exploring onto a single pan-and-zoom display. As you hit breakpoints or step into code, Debugger Canvas shows just the methods that you’re debugging, with call lines and local variables, to help you see the bigger picture.

http://msdn.microsoft.com/en-us/devlabs/debuggercanvas

I tried Debugger Canvas out, seems like it could be useful to some developers. One nice feature is a canvas can be saved to XPS and emailed.