You may blog, comment, share your way through the day, but what if you could tumble them all together to make something better? Join our chat with David Karp, founder of Tumblr, to learn how the self-publishing world is changing, and tips to help your brand best navigate it. Tumblr lets you effortlessly share anything. Post text, photos, quotes, links, music, and videos, from your browser, phone, desktop, email, or wherever you happen to be. You can customize everything, from colors, to your theme's HTML. Even use your own domain name.