This is old, but thought I would post again for anyone who is still looking. A great tool for putting together iPhone mock-ups in Photoshop. I have found several elements missing and usually have to create a couple custom elements from scratch, but it is useful as a starting off place. I’ll try and post an addition to it with some of the asset’s I’ve made soon.

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http://www.teehanlax.com/blog/?p=447