If you want to learn social media: Mack Collier, Jason Falls, Beth Harte, Chris Brogan, Amber Naslund If you want to go a little more high-level: Alan Wolk, David Armano, Greg Verdino, Geoff Livingston, Valeria Maltoni If you want to learn about design/UX: Whitney Hess, A List Apart, I Love Typography, The Dieline If you [...]