Last week Windows Phone developers Ryan and Travis Lowdermilk revealed some new features of the upcoming WP7 update – Windows Phone 7.5 aka Mango and now once again they revealed more new features coming to Windows Phone 7.5.
Facebook Chat integration along with Windows Live Messenger in Messaging.
Office Hub – integrated SkyDrive and Office 365
Group Messaging- You’ll be able to create groups and you can send text or email
Games Xbox LIVE improvements and Setting Changes
Support for Xbox Live, Sync option for users to sync games and their settings over its cloud network. Lockscreen will display album art when a song is playing
More Coverage on>> Windows Phone Dev Podcast