For those who were worried the day would never come -- the T-Mobile (U.S.) HTC One S is finally getting Android 4.1.1. As confirmed in our HTC One S forums, the sizable (675-megabyte) update brings Jelly Bean, with all its bells and whistles, along with any number of bugfixes. (As of this writing, we're waiting on T-Mobile to post the full changelog.)
The update's a Wifi-only deal, so fire up the router and get downloading.
More: HTC One S forums