DRM has been around, along with some receivers, for a while now. I used to have a WinRadio G313e software-defined receiver that was DRM-capable. It's an interesting digital mode, and when signals are good, it sounds great. It's not too popular amongst broadcasters in the USA, but I was able to receive signals from Canada fairly easily. Here's a thread from a couple years ago, including a post by me showing my WinRadio receiving DRM. I sold the radio a while ago because I was unable/unwilling to put up a decent antenna:
http://www.radioreference.com/forums...82727-drm.html