Sometime around 3amET, the cable and broadcast networks will be making the move to Invesco Field, to set up for Sen. Barack Obama's acceptance speech.

The move was described to us as a "disaster," by an insider today, but it has to be done. ABC News political director David Chalian said it will be like, "covering two different Democratic Conventions."

NBC anchor Brian Williams tells TVNewser, although it will be a, "logistical challenge," it has been done before. "Everyone has got to remember Kennedy did it in Los Angeles," he said. "But this will be something."

CBS Early Show EP Zev Shalev told TVNewser this morning he's happy with the anchor handling the duties. "We're blessed by a guy who can talk off the cuff," he said of Harry Smith. "He's experienced and terrific."

And although Shalev said it's, "going to be a big challenge," he said, "It's why I like television."

Tomorrow will have Bruce Springsteen, Jon Bon Jovi, 80,000 people in the crowd and staging that has been described as resembling an "ancient Greek temple" (and described to us as looking like the White House Rose Garden). Any guesses on ratings for tomorrow night?