I post the link below because today I have time to post what I could post everyday: examples of MSM bias. I posted this link because it has a handy summary of just one day of MSM bias from the NY Times. Associated Press and USA Today. You don't get more MainStream than that triumvirate.
OpinionJournal - Best of the Web Today: "Sloppy bias if not out-and-out dishonesty is endemic in the reporting on the administration's terrorist surveillance programs."