They aren't my first choice. That's why i bought a high quality camera to fit in my pocket as a compliment to my DSLR rig. But then again, the best camera is the one you have with you. And unlike some people I know, I don't go around 24/7 with a camera, or rather a non-phone camera. My phone, however, is always with me. Thankfully technology these days has allowed me to take pictures that I'm happy with and mobile photo editors let me tweak things on the run. I have to say it's extremely convenient when you are at a stop light and are suddenly inspired...which has happened to me more than a few times.
Does the fact that the picture was taken with a camera phone make it any less of a picture? Does it make the content any less influential or relevant? I tend not to think so. Not many people care about what brand of wrench the mechanic uses on your car, or the type of keyboard this blog was written on. Then, on the other hand, you have brand loyalty. I've seen other photographer almost come to blows over what was better, Canon or Nikon...leaving out Sony, or Olympus, or Panasonic...all of whom make great quality cameras...the same way people argue passionately about using a PC vs Mac. At the end of the day, it is preference, and I'm willing to bet that most people, myself included, would have trouble looking at a picture and saying that it was taken on a Canon or a Nikon or a Sony.