Deleted Scene: So many that they were able to make a whole other movie out of them.
Development Hell: The sequel. Paramount had expressed interest then lost it then renewed interest...then stepped off again...and finally greenlit the project come 2012, over seven years after the first movie.
Missing Trailer Scene: A good portion of scenes from the trailers were omitted from the final cut. These scenes include Burgundy taking a bullet for Veronica, and a later shot of him and her emerging from a television van to a cheering crowd, with Burgundy visibly showing a bandaged wound. The line where Ron asks Garth about his divorce while at a party, is also missing. Other shots cut include Ron walking into a filing cabinet and falling over, alternate dialogue when Ron asks Veronica what her dream is, Veronica and Ron tackling each other on the conference room table, collapsing (with Ron shouting "Let's make a baby!"), Ron admiring his own billboard, asking Ed Harken what a "lead" is, sitting by a poolside, standing by the side of the road with a long beard and guitar on his back trying to hitchhike, and others.
Real-Life Relative: Adam McKay's daughter, Lili Rose, makes a cameo as a girl insulting Ron while he's walking on the street. Mc Kay's wife, Shara Piven, plays the girl's mother.
During the production, a lot of alternate takes were produced and a lot of plotlines were cut, including a major plotline about an inept terrorist organization known as "The Alarm Clock". So many, in fact, that instead of being included in a Director's Cut version, they were edited together to produce a Direct-to-DVD sequel Wake Up, Ron Burgundy: The Lost Movie.
The original producer was, of all people, Paul Thomas Anderson. In fact, he instigated the film! After director McKay and Ferrell wrote a different screenplay and couldn't get it greenlit, Anderson said that they should make a new script and whatever they made, he'd produce it. For one reason or another, he couldn't produce after all.
Adam McKay has said that in the first draft of the script, the story was about a planeload of news anchors who crash in the mountains and discover that the plane which they collided was carrying monkeys and martial arts equipment, leading to a battle between cannibalistic newsmen and star-throwing monkeys.
The scene with Jack Black as the biker was intended to go on a lot longer, but was heavily trimmed down for the final product. The original version of the scene can be seen here.