Microsoft today released free Windows Live Messenger for iPhone/iPad/iPod users. The application is live at iTunes store and this is the fourth iPhone application from Microsoft.
This application lets you to chat with your Windows Live Messenger friends as well as Yahoo messenger friends. You can receive the notifications even when the application is closed. This application also brings Hotmail inbox to your phone and lets you read and reply to emails. The built-in social networking features let you to post content to Facebook, Flickr and SkyDrive. Some screenshots of the application: