How many roads again?

I remember hearing a while ago that Bob Dylan, of all people, was considering recording the voice for a GPS navigator. If his speaking voice is anything like his singing voice, a lot of people are going to end up in ditches.

So I was surprised to find out that there are actually already a bunch of these celebrity voiced gps units. Mr. T (I think he just yells at you)? Gary Busey? Knight Rider? And last of all, and for reasons no one can understand, Curt Schilling.