Dear Friends,
Here is a nice blog posting about the applications of twitter in libraries.
http://mobile-libraries.blogspot.com/2009/09/100-ways-to-use-twitter-in-your-library.html
Twitter is a free social networking and communication tool that lets you send short messages of up to 140 characters to your group of friends via the Twitter website
Many libraries from various countries are successfully using Twitter service to broadcast messages and interact with library users. I hope that, this article will help you to get more insight into how Twitter support library services.