This week: “Enlightened” actress Laura Dern on brains and Baio… Folk-rocker Billy Bragg wins hearts and minds in our etiquette segment… They Might Be Giants list tiny gems… We toast the first man(nequin!) in space… The story behind SXSW, as told by the festival’s co-founder… Indie musician Tracey Thorn finds her voice… Plus, build-your-own hotels, cocktails by the barrel-ful, Side of the Road music, and lots more.