Our 777's and 350's both offer cameras for pax viewing.
The coughpit camera sounds like the PERFECT place to hang my hat..... It would be the biggest privacy issue since the coughpit Voice Recorder.
Really, if you want to know what happens in the coughpit, buy one of those flight DVD's out there for enthusiasts, or ask to visit us after the flight.
jb747 has posted up a few GoPro timelapse videos from inside the coughpit.
Frankly, they are pretty boring, even in timelapse. I guess other pilots might find the technical details fascinating, me, not so much. The view out the windows is the most interesting, but a lot of the time it's dark, or the sun is glaring in, or there's nothing to see but clouds.
The issues for privacy and security of a live cam would be horrendous. And you'd get some plane nut annoying the cabin crew, "Look, I need to get a message to the idiots in the coughpit. I've got a copy of the owner's manual for this aircraft here on my Android, and I can see on the coughpitcam that they have the setting on the CRM 114 Discriminator module all wrong. That's why the wingtips are wobbling around and we're in danger. We'll crash into something, for sure."
What I would like to see would be an exterior cam or two that had some decent resolution for those times when the cabin lights are dimmed, the shades drawn, and we're passing over some interesting terrain on a day flight.
Or for those sitting over the wings or on the wrong side of the plane. I remember a JFK-NRT flight once where we got a message from the coughpit to the effect that on the right side of the plane we could look out the window and see Mount McKinley - "the clearest view I've ever had in twenty years of flying this route," he said, the joy just flowing in his voice. I was sitting in a window seat and had an excellent view out of the left side, so I felt a little disgruntled.