We all have at least one and most of us have several. Some of them we use once others we use almost every day. For the most part, we create them ourselves but increasingly they are assigned to us. We are told we should keep them a secret but we often share them with thousands or even millions of people around the globe. What is all this fuss about? Usernames. In this MSN video, learn all about what your own username(s) may be telling the world about you.