Desktop Layout bulider
It would be nice to build a layout on the the desktop then sync with the iPad. Making layouts on the iPad is clunky at best. trying to change the size of a button the iPad keyboard covers the field you are entering data into and cannot see what you are typing.
May I suggest a web application for the layout builder? So that users can save it to their accounts and retrieve in the iPad app. This way the developer doesn't need to maintain another executable on multiple platforms and users don't need to deal with import/export.