But Brent Bozell's Media Research Center appears to be organized more on an "issues covered" basis. http://www.mrc.org/archive/nq/welcome.asp probably gives a handle on the "what's covered" aspect. Getting to "what's not covered" is inherently more difficult - it amounts to reading the inside pages and choosing what should have been covered more prominently.
There are a good number of sources to check -- WH news releases are updated multiple times daily; read the Congressional Digest each day; Check the Congressional Committee meeting schedules.
Some things just don't surface, e.g., Able Danger hearings of recent.
I'll root around and see if I can find a "News that never made the news" sort of summary. "News that isn't newsworthy" is easy (Cheney shooting; DPW deal; Katrina/NOLA revisited on the occasion of Mardi Gras).
Regardless of us calling them the "dinosaur media" they are still "in charge" of deciding what gets on the news and what gets ignored. Until we seize that power from them we are meaningless.
I think a daily thread, with weekly summary, could be a really powerful force for shaping what is and is not considered "newsworthy" today. I'm having a hard time finding an existing "hook" to begin such a thread from. I think we're (I'm?) going to have to create it myself.
W.C. Fields once said, "there comes a time in a man's life when he has to seize the bull by the tail and face the situation."
I'm afraid I'm working up to seizing a bull's tail. Wanna join me?