Exploring iPhone photography

I've been post-processing some images from my iPhone lately using various iPhone apps, sometimes augmented by some extra tweaking in Aperture. It's interesting to see that in areas where I would have expected the tiny iPhone camera to fall short, like subtle gradients and low contrast areas, it actually creates an interesting grainy texture that's quite pleasing to the eye. Some extra sharpening usually brings this out even more. Gives the photos a little bit of an analog feel. Below are some recent examples.