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.

Related

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

iPhone & iPod touch use a service called Skyhook that can track your position by detecting what WiFi signals are around.  Skyhook sent out roaming vans and associated WiFi signals they detected with specific locations. Pretty dang cool. Looks like they have a developer API as well. Doing some quick searches I also found similar services (Herecast) that could potentially be used to extend functionality of other WiFi enabled devices.

Related:

http://machinesthatgobing.com/apple/skyhook-macworld-apple/