The complete transcript of his acceptance speech is here, and is definitely worth a read, but I'd like to quote a part of it here:
Temptation to co-option is the original sin of journalism, and we're always finding fig leaves to cover it: economics, ideology, awe of authority, secrecy, the claims of empire. In the buildup to the invasion of Iraq we were reminded of what the late great reporter A.J. Liebling meant when he said the press is "the weak slat under the bed of democracy." The slat broke after the invasion and some strange bedfellows fell to the floor: establishment journalists, neo-con polemicists, beltway pundits, right-wing warmongers flying the skull and bones of the "balanced and fair brigade," administration flacks whose classified leaks were manufactured lies - all romping on the same mattress in the foreplay to disaster.
Five years, thousands of casualties, and hundreds of billion dollars later, most of the media co-conspirators caught in flagrante delicto are still prominent, still celebrated, and still holding forth with no more contrition than a weathercaster who made a wrong prediction as to the next day's temperature. The biblical injunction, "Go and sin no more," is the one we most frequently forget in the press. Collectively, we don't seem to learn that all it takes to transform an ordinary politician and a braying ass into the modern incarnation of Zeus and the oracle of Delphi is an oath on the Bible, a flag in the lapel, and the invocation of national security.
Would that we had more like Mr. Moyers.