I think they reduced or eliminated the transfats in Krispy Kremes. It's not that hard to do in any food since the artificial transfats are pretty much from partially-hydrogenated oils.
Hot Now means that they are right out of the oven, and that supposedly makes them taste better. I don't think it does, personally, but to each his own. That said, what I've seen packaged as "American Donuts" here are vile and Krispy Kremes are better than them, if just slightly.