It seems like only yesterday that Walmart was doing its best to beat Apple at the digital music game by delivering us DRM-free digital music. Alas, the inexorable might of iTunes has, at last, become too much to bear. According to Digital Music News, Wally World's MP3 store will shut its digital doors forever on August 28th. Chin up, Walmart, we won't be coming to you for the new Kanye jam (not that we ever did), but we