In the grand scheme of things, $25 is neither a crazy price for an iPad stand nor even really all that expensive by comparison with other options we've tested -- PropUp LLC's new PropUp ($25) stand for the iPad is actually one of the least expensive holders designed specifically for that price. But it's made entirely from soft black foam with a "fresh from the factory" scent, and sort of dicey in the utility category: left on a flat surface, it's…