Interesting, I remember a while back they tested the center of gravity of a lot of vehicles, and found ALL SUVs to have a higher center of gravity than ALL cars. Which makes perfect sense, being that not only are SUVs taller than most cars, but they're also a bit further off of the ground.
Of course, just because a vehicle's center of gravity is higher, doesn't mean that in normal driving it's more likely to fall over.
Just a few weeks ago, five people died in my state in an SUV rollover accident.