WAL-MART has shutdown its video download service less than one year after launching. This marks Wal-Mart's second failure in new distribution paradigms for video. The retailing giant canceled its online DVD rental service two years ago. WARNER MUSIC will join the march away from DRM by offering its tracks protection-free on Amazon's MP3 download service. The company is also in talks with Apple to offer unprotected music via iTunes. Of the Big Four music labels, SONY BMG is the only one still ...