The bad news is, it turns out $10 webcams do not automatically adjust gain. Driving around during the day yields a time-lapse movie of what appears to be the afterlife. Here's a daytime driving still:
I see dead people! Twilight looks a little better:
But many of the stills have alot of blur in them, perhaps the low quality CCD has a slow shutter speed.
Maybe if I can find a software shutter speed control then I can both operate during the day and eliminate most of the blur. Otherwise, I'm going to have to pony up for a better camera.