Prosumer

Term coined by Alvin Toffler in his Book "The Third Wave" (1980)

http://en.wikipedia.org/wiki/Prosumer: "A contraction of the word producer or professional with the word consumer. The term has taken on multiple conflicting meanings: the business sector sees the prosumer (professional–consumer) as a market segment, whereas economists see the prosumer (producer–consumer) as having greater independence from the mainstream economy."

Recently, to take into account the emergence of the P2P Phenomena, the term Produser has been suggested as an alternative.