The Auto Prophet caught sight of a preproduction 2006 Ford Mustang Mach 1 on his way to work. Too bad he didn't have a camera.
The Auto Prophet works for an Auto Manufacturer in Michigan and has a very informative blog which you can see by clicking the link above.
I'm going to check the Mustang Source and see if Brad Barnett has anything on this, you can see for yourself here; www.themustangsource.com Brad has had info on the new Mustangs before almost anyone else and somehow manages to get pics and specs early.
Both sites are worth checking on a regular basis if you love cars.