Looking for something to listen to at work besides that shiny new iPhone? Check out 4vfr.com and www.liveatc.com for some live streaming control tower feeds. Part of a commitment to stay sharp in the cockpit requires a little bit of study done away from the airport. These sites both fit nicely into that niche by allowing you to follow the high speed chatter at your favorite busy hub. Try picking up an arriving or departing flight and follow them through the various stages from approach all the way through to the ramp. If you've got a favorite stream that we didn't include, please point it out in the comments.