RapGenius, the popular-but-huh? social rap lyric annotation service, has expanded into news stories, and it's pretty darn nice. Apparently NewsGenius has been around since last May, but I just discovered it today through the WSJ, where Farhad Manjoo describes using the site to pick apart Snapchat's defensive post on their user info leak.
Community commentary is in orange, and can be voted on, shared, or responded to in pop-ups, while annotation from "verified scholars" (journalists or subject-matter experts, presumably) is called out in green. The orange comments run the gamut from fact-checking to lolcats, but the voting system at least keeps them entertaining, and the green "verified" annotations are consistently high quality. Go check it out!