Here I post few Awesome Features Coming with Windows Phone 7 Mango!. But few more features coming with Mango update (WP 7.5).
1) Windows Live Messenger, Facebook chat and AOL Instant Messenger all integrated under Messaging.
2) Office 365 and Skydrive built into Office hub.
3) Group Messaging: currently there are some nice 3rd party apps that do this, but the ability to have pre-defined groups to message to will be now native, allowing to create quick groups for Family, Work, Friends, etc. This will work for Email and SMS.
4) Artist art on Lockscreen: This is very cool, especially those with Zune HD players. What this does is pull down the Zune/Artist artwork of your current selection and plays it in a marquee/banner fashion on the screen.
5) Xbox gets a facelift, including ‘sync’ option (potentially for online-game play).
6) Native Checkins are coming e.g. Facebook Places.
7) Visual Voicemail.
8) Battery saving features/options, under Settings..
9) WiFi Hotspot support
Now we can change wallpaper also, check with above image. There is a option called change wallpaper..
We can expect few more features with this Mango update. May be SKYPE integration also one feature in WP 7.5..
Let see, we need to wait up to May 24th for Mango preview event.