HootSuite – The Professional Twitter Client
http://hootsuite.com/

HootSuite makes it easy to manage multiple users over various Twitter accounts. Impress your friends, your boss, or just yourself with our link statistics and visualizations. Find out what people are saying about your brand right now. Organize your Twitter streams into tabs and columns. Personalize the layout just the way you want it. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.