The first annual Social Upfront, presented by Efficient Frontier, will bring together executives from social media giants, advertising agencies, and media companies to discuss the impact of social media on brands, media, and marketing industries. Speakers include Steve Patrizi, v.p. of marketing solutions at LinkedIn; Andy Wiedlin, senior v.p. of sales for The Huffington Post; and Lynn R. Girotto, senior director of Bing engagement and social media marketing for Microsoft. Register here.