Well, this is a big waste of everyone’s time. The Entertainment Retailers Association has launched a new logo that purports to indicate to consumers whether or not a store sells MP3s, as opposed to DRM-ed WMA files. They’re calling it “MP3 Compatible”.

To start with, 7Digital, Play.com, HMV and a few other download stores will use the logo on their sites, but the ERA are hoping that makers of digital music players will start using it too. Except they won’t. Because almost every device that plays music already supports MP3, so it doesn’t really need to be labelled…