Whenever the blog Rollo & Grady posts a letter from Bob Lefsetz, I try to read the whole thing. Â His latest article raves about a new music service/website called Turntable.fm. It is somewhat like a mix of those old AOL chat rooms and Pandora, where users enter a room (or create one) and then whoever takes turns adding songs to the playlist. Â Watch the video below or just go straight there.