It's difficult, of course, to find a Jay-Z CD at Walmart, because Jay-Z is so damn smutty. And Walmart, through the years, has also deemed a whole bunch of other artists morally wanting. This is because Walmart is so obviously a righteous company. Except, of course, when it's peddling make-up to minors. The Atlantic Wire's Deb Weinstein has a good round-up, which you can find here.
Most Americans don't get enough sleep. More and more employers are trying to help address that.