The terse announcement came just after 9:45 p.m. Sunday from Dan Pfeiffer, the White House communications director. “POTUS to address the nation tonight at 10:30 PM Eastern Time,” he wrote on Twitter, sharing the same message that had just been transmitted to the White House press corps. According to Brian Williams, the “NBC Nightly News” anchor, some journalists received a three-word e-mail that simply read, “Get to work.” *snip* That speculation was not aired out on television immediately, but it did erupt on Twitter and other social networking sites. Wishful thinking about bin Laden’s death ricocheted across the Web —...