The rivalry between Kanye West and 50Cent now extends to Twitter. Who wins? We also highlight music services that help you find tunes on the web. Some you know, some you don't. And then there's iTunes Ping. Is it a pass or is it a fail? Show Links: 50Cent Twitter, Kanye West Twitter, Kanye West Blog, Jay Smooth, Arcade Fire - The Wilderness Downtown, Jodi.org, blip.fm, Twt.fm, iTunes Ping, Shufflr Credits Music Video: Little Red - By Cathy Davey Directed by Lorcan Finnegan