1. Tb.ly is a different kind of short URL service that solves problems like availability, reliability, speed, consistency and searchability that traditional short URL services face. 2. The document discusses how tb.ly can utilize HTML5 Offline Web Apps technologies to create benefits like offline Gmail, Docs and Calendar and for Taobao specifically, benefits like a free deep caching CDN, local login-free access and localized local search of seller transaction records. 3. The origins of tb.ly are discussed along with how it divergently applies technologies like HTML5 Offline Web Apps capabilities.