If you happen to be holding an AT&T branded Samsung Galaxy S II in your hands, you will want to locate the nearest USB cable, plug your device in and fire up Kies as quickly as you can. The long-awaited Ice Cream Sandwich update is finally hitting the AT&T branded devices, and this is currently only available through the companion software, Kies. While exact information about the update and the changes that it brings is not currently available, we do know it brings some great updates for the device. Delay no more, go grab your cable, launch Kies, and get updated! After the update be sure to hop into the forums and let us know any issues or changes you find, and how your experience with the update goes!
Source: Galaxy S II forums; thanks to everyone who sent this in!