I've created an app and hardware add-on for iphone which will allow you to blow into hardware add-on (while attached to data port) and view results on iphone and ipod. I'm up to the point where i need to sync both the software and hardware but am not sure of the API and interface of the data ports. For a project like this, will i need apple's permission. In other words, does anyone know how to sync third party hardware with the iphone/ipod?