I bet Fox is regretting the decision they made back in the 90's to turn down South Park.

Before being picked up by Comedy Central Trey Parker and Matt Stone were "turned down flat" by fox executives. 

In an issue of Details magazine they say that before any interest was shown for the show they had a pitch session with Fox.  After the antimated series was dismissed by Fox they gave Stone and Parker some advice. They said the show would never work and that it should be two guys and a girl, or should include more ethnicities. 

Jokes on Fox, South Park is now on its 15th season and is signed through 2013. 

(Sources: 1, 2)