ngmoco:) announced yesterday it's plus+ network -- a community gaming platform similar in function to the XBox Live network or the Playstation Network, but for the iPhone.
The plus+ network lets you create an identity that you will eventually be able to use across all ngmoco:) games and games from other developers that integrate with the system. This identity lets you track your achievements, compare to friends, send and receive challenges, etc. Much like XBL or PSN, you are given a score across all games that is derived from achievements in those games.
The challenges system takes advantage of the push notification services of the new iPhone OS 3.0 which sends the notice of a new challenge directly to the phone.
Here's a quick look at what it looks like in the just updated Star Defense, version 1.2 for iPhone OS 3.0.
When you first launch the new Star Defense, you'll see a new logo in the upper right, the plus+ logo. Click the logo and you will be prompted to login or join the network. If you click join it will walk you through the usual steps to create an account -- gamer tag, password, email, etc.
From there you can add friends, check your achievements in the games registered, read news on all of the games, etc.
More functionality will come once you add a few friends and start sending challenges back and forth.
So far, the plus+ network looks promising. I can't wait to see more games added. Feel free to add me as a friend, let's see how this thing works. I'm jeff148apps on the plus+ network.