On the heels of the AT&T BlackBerry Z10 announcement earlier today, it looks like things are off to a good start as OS software 10.0.10.88 (OS version 10.0.10.684) is now available OTA. Current users with an unlocked Z10 on AT&T were left out in the last round of updates from other carriers, so this is a welcome update and it will most likely be the same version for AT&T devices at launch. No word of what's new in this version yet, but you can expect it carries over some of the fixes from other carrier updates including battery life issues, calendar & contact fixes and camera optimizations.
If you're a Z10 user on AT&T, check for updates to get this one going and be sure to report back with your findings. If you're seeing this offered up for other carriers be sure to drop a comment and let us know!