He posted the article. Read it, then read it again. And you'll be able to answer your own question.So your contention is that the entire tape of the speech was freely available 4 years ago, but not a single news outlet chose to mention the parts of it that just came to light yesterday? And I'm not talking about the "quiet riots" remark that was mentioned in the link you posted, as that was in the prepared remarks initially released.
The 2007 event was open to the press, and CNN affiliate WAVY recorded the full speech. The crux of his speech was reported by CNN at the time on air and online.
The speech was reported on or discussed multiple times on CNN over a three day period.
Segments aired on the "The Situation Room" and CNN's "Lou Dobbs Tonight" on June 5, 2007, which was also the day of a CNN Republican presidential debate.
The next day, CNN anchor Paula Zahn noted in her program, "Because of the Republican debate, you might have missed a new controversy involving Democratic presidential candidate Barack Obama." Her program, "Paula Zahn Now," included a report on the comments and a panel discussion. A report by CNN Correspondent Mary Snow on the racial aspect of the comments also ran on CNN that day.
"This was hardly a secret tape," he said. "It's in the tape library of most of the networks, including CNN. It was a publicly covered event. It was discussed not only with [Fox News commentator and conservative] Tucker [Carlson] but on Fox. ABC talked about it."