Ben Horowitz is co-founder and partner of Andreessen Horowitz. He was a co-founder and CEO of Opsware (formerly Loudcloud), which was acquired by HP, and ran several product divisions at Netscape. He serves on the board of companies such as Capriza, Foursquare, Jawbone, Lytro, Magnet, NationBuilder, Okta, Rap Genius, SnapLogic and Tidemark, and blogs at bhorowitz.com. You can follow him on Twitter here.