Probably this got mentioned earlier in the thread, but here's a prime example of media bias: talk radio.
Talk radio started becoming a significant media outlet starting in the 90's, back when the FCC Fairness Doctrine had been dumped and plenty of AM radio stations were ready to be gobbled up by Clear Channel and the like. Talk radio is very much a conservative outlet, in terms not only of the ratio of conservative to liberal shows, but even more so in terms of influence. Who do you think has a bigger voice - Rush Limbaugh, Sean Hannity and Glenn Beck, or Thom Hartman and Stephanie Miller?
Face it, conservative hosts tend to be, shall we say, a bit more flamboyant and entertaining, seeing as how they tend not to feel the need to be constrained by facts, decency, or logic.
I'm just saying.
I have no time for lies and fantasy, and neither should you. Enjoy or die.
-John Lydon
Reality has a well-known liberal bias.
-Steven Colbert
I never meant to say that the Conservatives are generally stupid. I meant to say that stupid people are generally Conservative. I believe that is so obviously and universally admitted a principle that I hardly think any gentleman will deny it.
- John Stuart Mill