Prof and Plagiarism?

A storm brewing at Mizzou, one of the country's most prominent J-Schools. A retired professor, John Merrill, wrote a column for the newspaper, which is run by the school. He used two quotes from another story without attributing them.
The paper publicly reprimanded him by taking his column away.
It's brought an interesting set of responses from ethicists and bloggers.
So is this plagiarism or something else? If it's something else, what is it? And how should it be handled? What are the "thou shalt nots" of media ethics? What are the grayer areas?