Windows Live Messenger available for Zune
Microsoft has released Windows Live Messenger for the Zune HD. Messenger for the Zune will let you check out social updates from Facebook, Flickr, or MySpace and chat with your friends. It also supports Facebook Chat just like Messenger on your Windows PC.
Messenger is available for download through the Zune Marketplace and could be a good indicator on what Messenger on Windows Phone 7 might look like.