The most coveted blank white space in the world has just shown an ad, the Google Search Page. When you pop over to Google to search something you'll find that a small blue line allows for a sleek Nexus 7 to pop up in a sweet animation-move to grab your attention while you're trying to figure out what the heck you were looking for. No other ad has ever been shown in this space, as far as we have found, and the move raises eyebrows. Will this space be available to buy for other brands in the future, or is it reserved for Google-products only? .. or is the playground open of all brands out there?