MSN Messenger Service is an instant-messaging program that notifies you when your friends are online so that you can send one a message or chat with several friends at once. In addition, MSN Messenger Service notifies you when you have new email in your Hotmail account and allows you to access your inbox with the click of a button. You have full control over who can contact you and view whether you are online. At any time, you can see a list of all users who have added you to their lists, and you can easily block them if you choose to do so. You can also invite someone in your list to meet over the Internet or to play an Internet game using NetMeeting. The program will even notify you when someone you are communicating with is typing so that you can avoid overlapping messages. MSN Messenger Service also offers integration with Outlook Express 5.0.Version 3.0 adds several new features, including Voice Messaging, free long distance, file-sharing capabilities, and the ability to send a message to your buddy's cell phone or pager. Note: In order to use MSN Messenger Service, you must have a Microsoft Passport user name or a Hotmail account. If you do not currently have one, you will be able to sign up during the installation of this program.