Mobile advertising network Mobclix has released a new iPad-specific software development kit to enable developers to integrate advertising into their iPad apps. The new SDK allows developers to integrate video and rich media ads into their apps in four different sizes: 468x60, 300x250, 120x600 and 728x90, with more options to come. The Mobclix iPad SDK is available for download from the Mobclix Developer Dashboard (free registration required). [via…