A trio of stories on Peer to Peer sharing [aka P2P, not to be confused with B2B, B2C or Y2K].
Salon has One on PopularPower, and the emerging P2P business world. There are several companies hoping to make some money off of the latest internet buzz words.
If none of that made any sense, read This One, a nice look at what P2P is all about.
There may come a day when ILL is done like this.