I just thought about it but there is another solution but you'll still need an ethernet shield. There is an app called Arduino Manager in the app store that allows you to control various elements on your Arduino through your ipad. In the description for the app it says there is a way to send text commands to the board which should allow you to do what is shown in the video above.
BTW You can do it the way the video shows but it is much harder to accomplish because you'll need to be able to create your own IOS app.