I tried the "Pinnacle TV for Mac HD stick". It's a plug&play USB device that allows you to watch HD TV on your Mac. In this case, my MBA connected to an antenna that picks up any available signal (or it can be connected to cable too, but it's not available in the office).
Jerry Springer full screen:
The device:
A definite "thumb up" on this on.
All iPhone Pics, of course.