★iPhone signature, Use iSign+★
You can not change your name, but you can change your signature style with iSign+.iSign+ can sign PDF and add signature to photo,and then send them via email or print via printer
Youtube show: http://www.youtube.com/watch?feature=player_detailpage&list=LLooD3IbLYeWxXfUrYDyc9iQ&v=bz2JpRlyVK4
Features:
*Sign PDF through handwriting
*Design signature and save it
*Take photo and add signature immediately
*Import & share document form Email or any other app that support "Open In" functionality
*Print PDF via printer on iOS 4.2 or later
*Send signed PDF via Email
*Tutorial video to show how to use it in app