From NYTimes.

1. Of the 16 best selling cars & trucks in America 10 are American vehicles. The Camry is the best selling car, but the Ford F 150 is the best selling vehicle (outselling the Camry by about 75% more)

2. GM and Ford both dropped far less than Toyota OR Honda in Dec 2008 ( I suspect its because of incentives).

3. Chevrolet is the only brand in the top 16 cars with positive change in sales year over year.