Filed under: Portable AudioBoth Wal-Mart and Amazon have already made their positions on DRM pretty well known, but it looks like each are now taking some further steps to ratchet up the pressure on the remaining hold-out record labels. For its part, Wal-Mart has reportedly told the record labels point blank that they must offer DRM-free MP3 versions of all their music, a matter that Sony BMG is apparently still the biggest hold out on. Amazon, on the other hand, is looking to give its downl
