This video has been found from a Mexican Android blog showing off a TouchWiz Jelly Bean ROM running on a Galaxy S III. The video shows off a few new features, like a revamped notification bar. They added a brightness slider, like AOKP has. They also included expandable notifications, but we’d be disappointed if they didn’t.
Looks like Samsung is working hard to get Jelly Bean working on their flagship. You can see a few theme elements missing, but otherwise it seems pretty ready for release. We should see it sometime soon, as Samsung said it’d be released at the end of August or beginning of September.