Microsoft has releases the Windows Live Messenger app for the iPhone. We are one of 4 lucky countries (US, Canada, UK, France) to receive this and it can be downloaded via the App Store. Some features of this free app are that you can update your status, a “Social tab” that brings “together all of your friends’ activities” and photo sharing. Microsoft says that future features will be able to integrate Facebook, MySpace, Linkedin.
Check it out here at Microsoft