iMockups for iPad - Mobile Wireframing & Mockup app

Many apps allow you to do pretty complex stuff on the iPad, such as iMockups for the iPad. This applications can actually allow you to start designing other apps for the iPad or iPhone, and also let you create detailed wireframes of how you want it to look.iMockups is simple to use and really useful as a storyboard creation tool. You can use it to assist in conceptualizing your iPhone app