I had to edit the original article.
My claim that 80% of the radio stations were owned by one company (Clear Channel) was wrong. I was misreading a statistic about something entirely unreleated to radio. (It just so happens that Clear Channel and two other companies own 80% of the billboard market. I saw billboard (the banner ads of the highway) and thought Billboard (the top 40 list) and subsequently overlooked the two other companies. I am a very bad Death Ray.)
At any rate, the *actual* figure is that Clear Channel owns about 60% of the *rock* radio market. Which is still a staggering figure, but not quite as staggering as the other one. At any rate, I've updated the article to reflect this.