Wal-Mart is following the actions of Microsoft, Yahoo and Virgin, shutting down its DRM (Digital Rights Management) servers on October 9. The move will render any Wal-Mart-purchased, copy protected WMA music files intert if not burned to CD prior to the server shutdown. Boing Boing is reporting that Wal-Mart has emailed customers warning them of the impending server shutdown and its effect on the