Twitter providing value in the workplace #businessproductivity

Twitter co-founder Evan Williams articulated the vision and evolution of Twitter at TED. Twitter is now reaching critical mass and has become a key aspect of any social media marketing strategy but it has never presented itself as a business productivity tool. Now consider the case of a large national retailer. Armed with mobile devices, your salesforce could simply Twitter a request for a price check, product info or availability to obtain real time updates in a way that requires no training, complex integration or expensive infrastructure. We have just begun to scratch the surface on using Twitter and its enterprise incarnations (Yammer, Identi.ca) to realise real business benefits. What are your business use cases for Twitter?