Read the whole thing (via Brian Lamb's excellent piece July/August 2007 Educause Review which is also definitely worth reading)

FROM "The ecstasy of influence: A plagiarism" by Jonathan Lethem (Harper's Magazine):

QUOTE

Artists and writers—and our advocates, our guilds and agents—too often subscribe to implicit claims of originality that do injury to these truths. And we too often, as hucksters and bean counters in the tiny enterprises of our selves, act to spite the gift portion of our privileged roles. People live differently who treat a portion of their wealth as a gift. If we devalue and obscure the gift-economy function of our art practices, we turn our works into nothing more than advertisements for themselves. We may console ourselves that our lust for subsidiary rights in virtual perpetuity is some heroic counter to rapacious corporate interests. But the truth is that with artists pulling on one side and corporations pulling on the other, the loser is the collective public imagination from which we were nourished in the first place, and whose existence as the ultimate repository of our offerings makes the work worth doing in the first place.

As a novelist, I'm a cork on the ocean of story, a leaf on a windy day. Pretty soon I'll be blown away. For the moment I'm grateful to be making a living, and so must ask that for a limited time (in the Thomas Jefferson sense) you please respect my small, treasured usemonopolies. Don't pirate my editions; do plunder my visions. The name of the game is Give All. You, reader, are welcome to my stories. They were never mine in the first place, but I gave them to you. If you have the inclination to pick them up, take them with my blessing.

END QUOTE