Mizuko Ito on cameraphone adoption and usage:

• "Most photos taken by the camera phone are not sent or shown to others, but are captured more as a personal visual archive."
• "One type of visual capture for personal use is visual note taking.": I find myself doing this a lot - snapping posters, products or news stories that I know I want to remember later.
• "...an emergent practice of visually archiving an individual’s everyday life. These photos are not posed or staged, or particularly well-framed our thought out. Rather, they are snapped casually, with the intention of possibly looking at them a little later, recording a momentary slice of a viewpoint on everyday life. "
• "...sharing photos feels more “intrusive” than email, and tend to feel more narcissistic"