With the invent of Internet, the way of communication revolutionized, a long ago. E-mail replaced traditional postal mail. Email was fast still there were some bottlenecks. One would not knew if the person on the other end is online or not, hence email was fast way of communication than postal mail but its constraints gave way to Instant Messaging (IM).
Instant Messaging like America Online (AOL) and CompuServe get famous much before Internet gets famous. We all have used and still using IM in our day-to-day life. Specially, among Young generation IM is very famous. How about setting our own chat server? Lets do it with an open-source and cross platform application called Openfire.