For me, the Super Tuesday round of primaries has one clear, across-the-board winner: The New York Times. Why? Because nytimes.com took advantage of one great advantages of the online medium over broadcasting, offering a wealth of highly local detail through a very nice drill-down interactive graphical interface.
The #1 national newspaper managed to be very local, offering me data on how the vote in Columbia County, Ga., where I live, compared with the vote in other counties in Georgia.
I was disappointed by the political blogs I examined, many of which seemed to be trying to play the role best suited to the broadcast networks: top-level "candidate X wins state Y" pronouncements. The real strength of the blogosphere is that you find pearls of real insight mixed in with the dross. Energy that should have been going into thought was, instead, going into the relaying of facts that were widely available elsewhere.
I can't comment in depth about the broadcast coverage. I put the TV MSNBC and the Olbermann-led crew hasn't driven me to go find the channel changer.