9900, given that it sports the same battery as well as the same layout for ports, sensors and buttons. But who knows, it could also just be an elaborate KIRF. Whatever it is though, it sure is interesting looking (to put it politely). It's boxy, sports sharp lines, an out-of-character silver front and a black, textured back plate. Oddest of all though, is the word "proceeding" emblazoned in large letters across the top of the device. We've got one more pic after the break but, if that doesn't quench your thirst, there's tons more at the source link.
Update: We've just spoken to the Bejing-based source of this eccentric handset, and it turns out that he's already sold three of these prototypes for an undisclosed price. Furthermore, the seller claims that this "9980" will actually be making its way to the market in a limited quantity once it gets the diamond treatment -- hopefully something slightly more subtle than Stuart Hughes' offerings.