Yahoo! Messenger is an instant messaging service with tons of features. You can access contacts and messages anywhere from any Web browser, communicate in any of 40 languages and share photos and large-file Web video. Challenge your friends in a series of social games, including Mafia Wars™ and Fishville™. Share and update your status, post comments and keep up with your conversations across Facebook™, and Yahoo! all from your Messenger. Always stay signed in to your chats and never miss any conversation, whether you are at home, at work or on your mobile device.