I'm out and about a lot, and often forget to bring my camera with me. I tried to correct this nasty habit, even going so far as to publicly announce that my New Year's resolution would be to carry my camera with me more often; but alas, I consistently happen upon amazing scenery with no camera to capture it.
I find myself increasingly relying on my iPhone when in a pinch. It's not just me; iPhone photography has expanded into a quasi subset of traditional photography. The fact that your phone is with you at all times lends itself to an immediacy that is often lost when a photograph is composed in the traditional scenes.
Whether you prefer an SLR, a point and shoot, or an camera phone depends on the reasons you are drawn to photography in the first place. I happen to value subject matter more than the act of picture taking; therefore I am more inclined to settle with lower quality camera phone picture. Others might enjoy the art of composition and manual manipulation at the point the picture is taken, and would therefore enjoy the capabilities of an SLR. Furthermore, a photographer that uses photo editing software might value the high MP and good optics of a quality point and shoot.
**Photo's in this post were taken on my iPhone.