As a camera, the iPhone 4 is really sweet. I hopped on my bike and took the device down to the Venice Skate Park, then out to the ocean pier, then rode back to the office and tested the device out in a variety of lighting conditions with less animated subjects. The images I took in this post (other than the ones I'm in) were snapped on the fourth-generation iPhone with and without built-in flash, and have not been altered in any way other then cropping, resizing, and considerable JPEG compression to keep web file size down for this blog post. No Photoshop, no Hipstamatic, no sweetening or sharpening the image content.
For technically-minded readers who would like to examine the pixels in their native state, with no resizing, click here for one of my images at original size after some JPEG compression (file size: 668K, image dimensions: 2592 x 1936 pixels).
above: waves hitting rocks, no zoom.
above: iPhone held in same position as previous shot, zoom slider pushed 50%.
above: iPhone held in same position as previous shot, zoom slider pushed 100% to the right, maximum zoom.
Above: The reclining figure and Mexican skull were on a shelf in the gloomiest corner of my studio I could find, with low light.
(All iPhone 4 snapshots in this post by Xeni Jardin. Photographs below and at the top of this blog post with Xeni, the iPhone 4, and our new skater pals Kiko and Drew at Venice Skate Park were not taken with the iPhone, but were shot by Julian Bleecker, who has more terrific skate park photos here)