Update: AT&T has published the changelog for the update (link to complete info):
The software update improves the AT&T branded application launch process, an EAS/Office 365 security pop-up fix, and an update to all Google branded applications.
Hey, do you still have an original AT&T Galaxy S II? Really? You should probably work on an upgrade. However, on the off chance you haven't already custom-ROM'd the ever-living-Cyanogen out of it, Samsung's rolling out an update for it, as we've heard at XDA, and had confirmed by Samsung's own support website. Note that this is the original AT&T Galaxy S II (model i777) we're talking about - not the Skyrocket.