iPhone stencils
Free
Mobile - iPhone
iPhone stencil from the Design Stencil kit in the Yahoo! Design Pattern Library.
Free
iPhone Wire Frames
This is a basic stencil for creating wire frames for iPhone optimized web sites (from April 2008) Includes standard components like form fields, buttons, dialogs, key boards, lists, loading icon, selected state. Any feedback would be appreciated, and I will make appropriate revisions.