Good news folks, as promised by AT&T Windows Phone 7.5 Mango update is here. At least for me on my unlocked AT&T Samsung Focus v1.3. That being said Samsung Focus v1.4 users will have to wait till mid October for an official update. All others can wait as the global roll out has begun or read this post on wmpoweruser to force update right now.
Update: Mango features hundreds of new features and with this I would say Microsoft is bang on target. Next year we will see many new Nokia Windows Phone devices taking this promising OS way further.