Today is Larry Page’s first day back as CEO of Google. There are lots of mainstream media stories dwelling on his detached public persona, Google’s perceived need (evidence?) to restore its reputation among consumers and partners, and whether it will take “moon shots” or focus. Well, its first move is a $900 million bid for Nortel’s patent portfolio to protect itself from lawsuits and trolls, and give itself flexibility in cross-licensing. Google needs to prove that its core approach to search still works, and is not threatened by social search technologies. It needs to make sure one of its best assets, Android, doesn’t fragment too much to be an effective platform and launchpad for search and advertising. It needs to build off Android, Voice and Gmail to be a serious player in unified communications. Welcome back!