I have an article in the current issue of Contagious Magazine about the remix, tracking its evolution from John Locke's combinatorial imagination through trailer trashing videos I've posted about before all the way to web mash-ups.
To steal from William Gibson:
the remix is the very nature of the digital
and as all media becomes digital, the remix will become its dominant construct.
An understanding of this is crucial for anyone interested in how people consume media: no longer passive but recombinant and collaborative.
I've posted a pdf of the whole article here.
Ps. Thanks to Nick Sommer - Design Ninja for the illustration.