Jim Bankoff, CEO of Vox Media (parent of sites such as SB Nation and The Verge), used his MediaLink NewFronts breakfast keynote slot to announce an extension of the company's month-old venture called Concert, which involves NBCU and Vox sharing ads across their respective sites. (NBCU is an investor in Vox.) Google has partnered with the companies to enable Concert with its programmatic buying infrastructure. Dade Hayes has the story.