Here is an interesting article from Wired discussing Jamaica's influence on remixes, mash-ups, and music sharing. And a related interview with DJ Spooky (also through Wired) titled How a Tiny Caribbean Island Birthed the Mashup.It is all centered around Trojan Records 40th anniversary (and the recent compilations mentioned here before by contemporary artists).
Even after 40 years, the Trojan philosophy of "reuse and remix" remains oddly in sync with today's culture of the copy.
"Everyone borrows from everyone," says Miller. "That's what digital culture is all about. Information, the cliché goes, wants to be free.
"I guess that Jamaican culture got there a little before everyone else."