"The Simpsons" episode 21.03 ("The Great Wife Hope") just aired and it dealt with a subject dear to my heart: Mixed Martial Arts.
Now, it's a few years late, but "The Simpsons" can't always be expected to be truly cutting edge (like the episode they did making fun of "24" -- it aired like three years after the first season of "24" was over). They already kind of took on martial arts in general early on in the series, when Bart wanted to take up Karate, but didn't have the patience or interest in anything besides the violence. Now, they've finally gotten around to MMA.
The Ultimate Fighting Championship is represented (as Ultimate Punching Kicking and Choking Championship) as MMA becomes popular in Springfield, but of course Marge has to protest.
As per usual, all sides are pretty well represented and made fun of. The kids immediately start imitating, Marge feels that she should be able to ban something if she doesn't agree with it, etc. People on both sides are portrayed as stupid and mean, but each argument is given just the right amount of validity.
It's a good episode, overall. Unfortunately, Chuck Liddell is SEVERELY underused as a guest voice actor.