X Marks The Spot...
Now let's see. Rubin's email about all alternatives to Java stating that they all "suck" featured prominently in the Oracle-Google suit. And now he's in Google X. And in Germany, Huber's Google Maps is in very hot water in concerning a Microsoft patent. And now he's in Google X too.
Google X - X marks the spot; that spot being, apparently, in Google Siberia.