Interesting. I was just at my local dealership yesterday where I brought the subject up to the GM and the bulk of his sales force, and they said that the cash-for-clunkers program has done nothing for them - haven't had a single one, nor did they expect any.
They said that their usual clientele doesn't normally keep a car long enough to qualify as a clunker.
Collectively, their political view of the program was that it was a useless, wasteful, 'feel good' with little real effect either on the current economic woes, or in it's impact on environmental concerns.