The nutshell version: These new bills proposed could shut down Blogger, Twitter, Facebook, Wikipedia... well, pretty much whatever the gov't doesn't like. I don't speak up on political issues very often, and I don't claim to be an expert on the issue, but I certainly dislike the sound of it.
I don't keep up with the news, as it tends to be a major trigger for my depression/anxiety, but Twitter keeps me pretty well-informed on the big issues.
Some links I found via Twitter, which will help you understand why I am participating in the Internet Fast tomorrow, January 18, 2012:
@GOOD : How SOPA Would Hurt Sports Fans
Could SOPA Shut Down Facebook? <-Includes an introduction by Darth Vader
Washington Post article : When you go to Google tomorrow, you'll see this
(I apologize, I forgot to keep track of the Twitter users who posted these links... I know, epic link fail! I will also be adding to this list of links as I come across them.)