Three tidbits came out of Google I/O that will impact the mobile/social gaming ecosystems.

Two weeks ago, Valve Software released -- to critical and popular acclaim -- the highly anticipated sequel to its comedic first-person puzzle game, Portal. The game was originally scheduled to launch on the digital distribution platform, Steam, on Tuesday, April 19, in the early morning. But it ended up being released nine and a half hours earlier as part of a promotional augmented reality game (ARG) designed by Valve and a group of indie game developers.