This article on MSNBC says a bit about how much US media are taking a steer in their editorial meetings from blogs:
NBC Nightly News Anchor Brian Williams gets much of his material for The Daily Nightly from editorial meetings. Part of the chatter at Thursday afternoon's meeting was all the buzz about those blogs and how they're creating a more inclusive dialogue.
“It used to be a few gatekeepers at the top decided what the topics of the national conversations were going to be,” says Glenn Reynolds of Instapundit.com. “Now it bubbles up from the bottom.”