App Sketch Book is Pretty Cool
So I met @stephenmartin at the awesome Mobile Camp Atlanta. We chatted it up a bit about iPhone stuff. A few days back he sent me an App Sketchbook. It's literally a sketchbook to help designers and developers mock up their iPhone UI on paper before moving it into InterfaceBuilder, etc.
I'm not exactly gifted when it comes to art/sketching and the like and I admit I was skeptical until I tried it. I think it's extremely useful if you either have a designer with you or you remember to pick up a stencil like the one TUAW showed in their recent sketchbook roundup. BTW, TUAW reviewed the App Sketchbook here. They seem to like it a lot. So do I. I'll be using it to help mock up our next app (after Blipr and Tippy, which already have fancy UIs).
Crappy pic below thanks to my iPhone 3GS.

