Celebrating today’s release of iPhone OS 3.0, Mary Jane from ngmoco shows off the company’s new Plus+ network.  Plus+ allows players of ngmoco’s ever popular titles (Star Defense for now) to challenge each other through push notifications.  They can also browse their friend’s stats all right from within the game.  Updates to profile pages can also be made without even exiting the app.  We can’t wait to get our hands on the Plus+ network and maybe you’ll soon get a challenge from AppSmile.com!