FYI ... Air Hockey app by Acceleroto has just released a free version. The original/paid version was the winner of the 2008 Best App Ever in the Arcade Game Category which was announced at Macworld Expo '09. Really love the realistic movement of the puck - very solid app, which you can now preview for free.
iTunes link >> http://tinyurl.com/airhockeyfree
iTunes link >> http://tinyurl.com/airhockeyfree