The live traffic updates work on my MD Trend with SYNC 2 installed.
Living near Canberra I have only noticed traffic updates two or three times however, when I have driven around Sydney I have received many updates, often to the point of distraction.
One time I was driving around the Picton area the system advised me of a road closure due to heavy rain and then offered me an alternate route which I selected. Very useful.
As I do not have WiFi enabled through my mobile I asume the updates are received through the SatNav.
Thanks for that! Do you find it accurate? The live traffic on my Tomtom is very accurate.