From CNET here :

SOPA, of course, represents the latest effort from the Motion Picture Association of America, the Recording Industry Association of America, and their allies to counter what they view as rampant piracy on the Internet, especially offshore Web sites. It would allow the Justice Department to obtain an order to be served on search engines, Internet service providers, and other companies, forcing them to make a suspected piratical Web site effectively vanish. It’s opposed (PDF) by many Internet companies, users, and civil liberties groups. Among the other Web sites that, in one way or another, have joined the blackout: Metafilter, the Consumer Electronics Association, BoingBoing, OpenDNS, WordPress, the Electronic Frontier Foundation, and what is almost certainly the Internet’s most popular dinosaur comic strip. Some physical protests are also planned tomorrow.  

Wonder what SOPA and PIPA mean to you? What the issues are? Here’s a helpful rundown.