According to Bloomberg, Motorola Mobility has just filed a new lawsuit against Apple at the ITC. Now, ordinarily, we might not report on the filing of such a suit - especially when the complaint hasn't been made public (we have basically zero details). What makes this particular filing important, though, is that it is the first lawsuit filed by Motorola now that it is officially, 100% a part of Google. That's a big deal.
It means Google signed off on this action. It means Google isn't interested in playing a purely defensive role in the mobile patent wars. And while this is sort of by proxy (MMI is in many senses separate from Google), the fact that Motorola filed this suit at all says a lot.