Facing competition from recently acquired AdMob (Google) and Quattro Wireless (Apple), mobile ad network has been steadily working to strengthen their products and offerings. The startup just acquired iPhone app sales analytics software Heartbeat and announced a deal to offer Nielsen’s ad targeting data into its ad exchange to enhance ad targeting. Today, Mobclix is officially launching one of the first SDKs for iPad advertising. Apple's new tablet device, which will be delivered to consumers in a few weeks, poses a tremendous opportunity for advertising. The size of the tablet not only allows for larger ad sixes but ads can also be more engaging and media rich, with the possibility of incorporating video and other interactive features. And these means more revenue for advertisers and developers.