If GM were to go down in the mess...
What would you be purchasing? It's hard to imagine what it would be like without GM, but what if after all of this bail out stuff and restructuring, they just can't get it done? Where is your money going to go?
The second part of the question is, what if all three American manufacturers collapse? What import company are you going to look to?
For myself, if GM is through, I will probably go to Ford. They have a solid lineup (with out a bunch of rebadges - except for Mercury, which should go the way of Olds and Plymouth, IMO) and with the new 400hp GT motor coming along with a pretty nice Taurus SHO, they will have product that people are more interested in than before. They are also the only American company not putting their hands on the bailout money - yet.
Now, if all of the US automakers are gone, I would probably switch over to Nissan. I really like the 350Z and Maxima. I've always liked the Pathfinder, too. Like Ford, they also have a very rounded lineup that isn't bloated with rebadges like GM. This would be very tough to do as I've never owned a foreign vehicle.
I know many of you stated in the "tuner" thread that you wouldn't ever own an import, but if the Big 3 were to perish, unless you were only going to buy used forever, you'd have no choice.
Just some food for thought...