About 18 million or so folks tuned in to NBC's Sunday Night Football Game last night, the Minnesota Vikings versus the Arizona Cardinals. That's a really good number, but it wasn't the boffo bonanza NBC had in mind when they used the NFL flex schedule option to choose Bret Favre over Tom Brady.

When I wrote about the flex schedule last week, a lot of reader comments said that NBC decision made perfect sense because the Vikings-Card game would be a bigger draw than the Patriots-Dolphins.

Well, guess what happened? The Favre game turned out to be a bust. The Cardinals, led by Kurt Warner, shredded the Vikings and won handily 30-17. It wasn't close and the ratings diminished from the second half on.

One of the perks NBC has over the other networks when it comes to its football coverage is what's called the flex schedule. Unlike CBS and Fox and ESPN which get the games that are scheduled months in advance without regard for ideal match ups, NBC has the option of plucking a better game for the Sunday Football Night in America broadcast. Hence the term, flex, as in flexible.

Thus far this season, NBC has had three chances to flip the switch and passed. However, on December 6, NBC has chosen a Vikings/Cardinals game over a Pats/Dolphins match.

The move by the NFL to exclusively air this weekend's game between the New England Patriots and New York Giants on their own NFL network, which reaches only 40% of US households, was met with much criticism and frustration. With a win this weekend, the Patriots would become the first team to go undefeated in a 16-game season (the Dolphins did it in the 14-game '72 season).

Now it looks like pressure from Washington has changed their mind and suddenly the game is airing on NFL Network and both NBC and CBS. Of course, several local affiliates to the two teams had already negotiated exclusive rights to the game and sold ads at inflated rates, so they can't be too happy about having to share the game now with CBS and NBC.

There are many swears that have started to make their way on to television, and I don't mean just HBO and Showtime. I've heard "shit" and "asshole" sprinkled here and there.

But there's still one word that's a no-no, and that's the famous four letter word that begins with the letter "F." It's banned on network television, and I think even on cable you can only get away with it so many times during one show. In the movies there are limits to the number of times it is used and the context (exclamation or verb?).

After the jump are the top ten videos of the word being used on live television. This Digg post lists the Richard Simmons clip as number one, but that's not accurate because they're outtakes, not live segments. Still funny though!