I've been thinking about over-the-air (OTA, i.e., antenna) television. AntennaWeb has this great thing where you put in address information (zipcode at minimum, all the way up to street address) and it tells you the channels you can receive (both analog and digital) and the compass heading (magnetic north!) and a map.
I haven't tried this yet, but there's supposedly a law? FCC regulation? that cable providers must give you a set top box with firewire output? Here is a forum about hooking up a Mac.
I also want to try this: MPEG Streamclip to "open most movie formats including MPEG files or transport streams; play them at full screen; edit them with Cut, Copy, Paste, and Trim; set In/Out points and convert them into muxed or demuxed files, or export them to QuickTime, AVI, DV and MPEG-4 files with more than professional quality, so you can easily import them in Final Cut Pro, DVD Studio Pro, Toast 6 or 7, and used with many other applications or devices."
And if you decide to start your own TV station someday and need programming, here are some "classic" public domain shows that you can usuall buy for a dollar or so at Target or Dollar Tree :) Also, don't forget archive.org for your programming needs.