Your list of failed or failing left wing media is downright inspirational! President Nixon coined the term "the silent majority" in the late 1960s. The fall and decline of leftist media sources demonstrates the power of the silent majority. CNN, NYT, WaPo, LAT, MSNBC, ABCNews, CBSNews, NBCNews and the other media on your wonderfully documented list are all on the chopping block--thanks to the not always silent majority.
Web 2.0 Is Reminiscent Of Marx
Without an elite mainstream media, we will lose our memory for things learnt, read, experienced, or heard. The cultural consequences of this are dire, requiring the authoritative voice of at least an Allan Bloom, if not an Oswald Spengler. But here in Silicon Valley, on the brink of the Web 2.0 epoch, there no longer are any Blooms or Spenglers. All we have is the great seduction of citizen media, democratized content and authentic online communities. And weblogs, course. Millions and millions of blogs.