It looks like a couple of HTC's Asian One X variants are receiving updates to Jelly Bean which appear to have begun rolling out earlier today. XDA users confirm that the update carries Jelly Bean 4.1.1 (not the latest 4.1.2) along with HTC's latest and greatest version of its Sense UI, and weighs in at about 353MB.
You may remember that HTC North Asia's general manager Jack Tong promised that One X owners in Asia could expect the update to begin rolling out to the One X today, with the One S slated to receive some Jelly Bean goodness at an unspecified later date.
Of course, if you're the proud owner of a One X in Taiwan or Singapore, and you don't feel like waiting for the OTA to hit, you can always download and flash it manually (at your own risk, of course). You can find the link below.
Unfortunately, if you own a One X in Europe or another region, there's no official word on when your update to Jelly Bean will be ready. To keep up with the discussion, just follow the XDA thread linked below.
Download: Asia OTA Update