I agree with brownsfan about it being a distraction. However, it can be very interesting to listen to during large news announcements such as FOMC. I also find the commentary interesting when a top ten local comes in and pushes the market his way during a slow lunchtime. Such a service gives you a better look at the human nature behind the market...
but I would never trade off of it. As to using it just as background noise...it completely depends on the individual.
I am only familiar with
tradersaudio.com