This is a very good idea. I've already noticed small businesses messaging me back when I mention their services and products; clearly, they're taking some time out of their day to manage their Twitter reputation.<p>Given the breadth of different companies I know have been involved with Twitter (from small local restuarants to boutique culinary appliance manufacturers to Comcast), there must be thousands of companies who would pay for this service, especially if Twitter can lower the barrier to entry for them and provide metrics so that company Twitter advocates can gin up some kind of ROI.