SOPA is the Stop Online Piracy Act, a bill being considered by the House. It would expand law enforcement's authority to fight the online sale of counterfeit products, as well as the trafficking of bootleg movies and music. PIPA is the Protect IP Act, the Senate's version of the same bill. Wikipedia, as well as other sites like Reddit, are going dark to drum up opposition to those bills, in part because they feel they could be in violation of what the new laws would establish. Also, Yahoo! co-founder Jerry Yang has resigned from the company's board of directors. It could be a sign the company is about to be sold.