Teleprompt+ is a simple yet powerful professional teleprompter for the iPad that offers flexibility and easy prompting for presenters, lecturers, students, teachers, broadcasters, podcasters, filmmakers, musicians, business professionals, or anyone who would benefit from having a powerful visual aid while engaged in public speaking.

http://itunes.apple.com/us/app/teleprompt+-for-ipad/id364903926?mt=8
Requirements: Compatible with iPad. Requires iOS 4.2 or later.
Price: $14.99