Sling Media, the company behind the popular place shifting set top box that allows you to stream cable from your house to your computer and other devices, Sling will be showing the iPhone version of SlingPlayer Mobile at one of its two kiosks on the Macworld Expo show floor and says the app will be submitted to Apple some time in Q1 for certification – whether or not Apple gives it the green light is another thing. Additionally, the company revealed that HD streaming will finally be coming to Mac users via a web-based version of the SlingPlayer software that will be accessible from Sling.com.