An article assigned this week concerned Citizen Scientists. In my professional experience, citizen scientists assist the media and science community in a unique way. I grew up for a while in what is colloquially known as "Tornado Alley". Trained Storm Spotters inform broadcast meteorologists of the location of storms and other weather related phenomena on a regular basis. Prior to the widespread use of radar, these individuals provided a valuable service, and they still do.
http://en.wikipedia.org/wiki/Storm_spotting