Apple's App Store downloads eclipse 15 billion; AT&T introduces in-app local mobile ads;

> Apple's App Store downloads eclipse 15 billion mark.

> AT&T introduces in-app local mobile advertising.

> Apple users on pace to download 61 percent more iOS apps in 2011.

> Flurry: Freemium titles yield two-thirds of App Store gaming revenues.

> Tapjoy scores $30 million to boost mobile app monetization.

And finally... Fish are using tools.