Thanks a bunch, MINI-Fit. (er... mahalo!) Sort of confirms what I had thought. I have some lower-profile "max performance" tires on order (which also have a higher load rating), so it looks like I'll be playing around a bit. The tires should have considerably less roll over than the factory all seasons. I was more wondering if the pressures would be too low to start hitting the blasted TPMS. Good to know mid-30's +/- is what you're running. I do plan suspension mods since the stock is kinda sloppy with a lot of body roll. The car is for street use (other family users), but I will drive it too, and I drive rather hard. I don't care about maximizing gas mileage -- mostly traction, safety, and reasonably even wear is what I'm after.
P.S. Looks like you're having some fun in your BOM Fit in your signature pics!