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The app lets you chat with your Windows Live and Y! Messenger buddies, see what your Messenger friends are up to on social networks such as Facebook, Flickr, YouTube and MySpace, and comment on their activities.
You can also upload photos, create captions and create photo albums directly from your phone. If you choose to, you can also receive IM notifications when the app is closed.
Finally, the app also lets you access your Hotmail account, and read, reply to, and compose e-mails.
Windows Live Messenger for the iPhone is available here [iTunes link].
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