Ongoing broad public conversations on a national or lobal scale are the unique and differentiating aspect of Twitter and enable us to characterize a handful of unique uses for this channel. Other brands are offering sneak previews of new products and services, limited time and exclusive access to new stuff or priority access and pricing to Twitter savvy customers. It also encourages brands to find and incent the active talkers and sharers in service to brand awareness, preference and purchase intent  Yet Twitter works like talk radio. Early Warning Radar.