While the publishing deal behind Jade Empire was already known for quite a while, the game wasn't officially unveiled until recently. Now BioWare has launched the official website of the Xbox project. Offering some more information on and screenshots of the action-adventure/RPG which obviously features Asian elements. It's not based on any franchise or rule sets they've used before.
There's also an interview on Jade Empire up at GameSpy as part of their TGS coverage. Jim Bishop and Greg Zeschuk elaborate on the battle system among other aspects. Looks quite promising. And let's not forget that BioWare is also working on a PC game that has yet to be unveiled.