Digg allows for information sharing and democratized ranking of submissions to the website, allowing for the user community to decide what is important or interesting!

Facebook is a social networking site that makes it easier and more effective to keep in communication with people we know, and learn about other people.

Twitter is a form of online social media that allows us to update what we are doing and where we are - in order to keep the people in our lives informed!

Microblogging, allows for brief text updates submitted via the web, instant messaging, e-mail, text messaging and MP3.