Tony,
I did it once, just to verify that I could, and then only used it a couple of times while waiting in "short time parking" at the airport. I forget now if Lex just made the hack more difficult or impossible in '07.
I thought, and still think, that it is too easy to be distracted for just the wrong instant if the screen is within your vision. Pretty soon your wife or navigator will want to watch too, then you're distracted for that instant, and you kill some poor, innocent, crippled little girl who is a genius earning 5 million per year, and the sole support of her family and two charities.