On C-Span there is a show called “After Word”. Today I saw an episode in which Eli Pariser, the author of “The Filter Bubble”, was interviewed by Clay Sharky. I only caught the second half of the show, but you can watch the entire thing here.
One observation made by Clay Sharky was that current filtering is mostly “supply” driven – that is the companies like Google or Facebook, use the info about you to decide what to show you on the internet. What is missing is the “demand” side – that is you having the ability to direct the search for things.
One possible exception today is Twitter. As Eli Pariser suggested, you can subscribe to Tweeter feeds of people who’s views you disagree with, and though that you will be able to get a better sense of what is happening outside your filter bubble.