If you want to design an iPhone app, here's your stencil.
http://www.beacon16.com/2010/09/the-visio-iphone-stencil/It contains the following shapes:
* iPhone
* Navigation bar
* Buttons: Blue, back, gray, light blue, Round Rectangle
* Search bar
* Browser bar
* List Group label
* List icons: detail, more, move, delete
* List item
* Grouped list items
* Group label
* Tab Bar: 4- and 5-tab configurations
* Various list item text shapes
* Segmented control
* Keyboard
* Action Sheet (with accompanying buttons)
* Alert (with or without title)
* Slider
* Toggle On/Off
* Date picker
* Image placeholder
