I ordered and finally got one for mine, just in time for "April 2014 delivery"
Both the model S and the auction dragged out forever it seemed, although the license plate came first
Mine is SUPER boring, just the company name.
BYE OPEC is good, there is lots of inspiration here on the forums, from USA especially.
Go for it, but remember if you choose a really funny one, you might have to bid over 8000 HKD! There are license plate professional sharks at the auction, and if they feel your plate is good the will bid for it and hope to sell it on later, with a profit.