I would like to suggest a graphical paradigm for track connections in Sonar. Bidule is an example of the idea.
The reason is because I often have trouble setting up complex layouts.
For example - Using Reaktor as a sound source and feeding that sound to an external plug-in that uses the same MIDI input.
I often spend a lot of time setting up the aux tracks and input/output connections between the tracks.
For me, a 'Track' is not a useful idea a 'Signal path' is more useful.