Is Facebook Planning An Online Music Service?

It's a circus with Amazon, Google, Apple and possibly Facebook launching an online music service.

Software Engineer Jeff Rose peered into the code of the app required for Facebook video chat and discovered a reference to Vibes and a MusicDownloadDialog. Here's the code:

if(paramString.equals("com.facebook.peep")) return this.window.getMember("VideoChatPlugin"); if (paramString.equals("com.facebook.vibes")) { return this.window.getMember("MusicDownloadDialog"); }

Other than this snippet, we have no idea what Facebook is planning, but it likely has to do with music. Any thoughts? [Mashable]