Update 2: The blog post is back, and the update should be rolling out today!

Update: It sounds like the blog post announcing the update was published erroneously, and has since been pulled down. While that's definitely a bit of a disappointment, it does mean that the update should be headed out very soon. Just not today. Bummer.

AT&T just announced that its version of the HTC One X will be receiving an update to Android 4.1 starting today. Here's the brief changelog that AT&T has published, which basically just explains Google Now and the new rich notifications of Android 4.1, along with a tweak to the front-facing camera.

  • Google Now, which provides you with the latest relevant information you need, when you need it. Whether you’re checking the weather, checking flight information, tracking a package or more, you can get the information that matters most immediately in a single swipe.
  • Changes to the notification display that groups updates from the same application together and allows you to expand or collapse any notification.
  • The ability to view the full text of an SMS message and the full photo of a MMS in the notification window. 
  • An event notifications display that offers more of the event description, allowing you to quickly see relevant details without having to open an app.
  • New countdown timer for the front-facing camera.

Head to the settings menu, go to 'About Phone,' and tap 'Check for Updates' to see if the update has rolled out to you.

This update has been a long time coming, with international versions of the One X having received it months ago. HTC released a revamped version of the One X, the One X+, last year with Android 4.1, while its previous flagship languished on AT&T in Ice Cream Sandwich-land. Owners will undoubtedly be happy to receive the new software, though one can only wonder when - or if - the AT&T One X will see another major update to Android 4.2 and Sense 5.

AT&T Consumer Blog