By now, you've probably heard about Google's limited release of its new social networking platform, Google+ -- but did you know this could be the most significant product launch in the brief history of social media? That may sound like an outrageous statement, but it's true. And it's valid regardless of whether Google+ proves to be raging success or a total flop. That's because Google+ is the best -- and possibly last -- chance for Google to provide some real competition for Facebook in the social networking arena.