Plagiarism is such a hot topic and John Palfrey (co-author of Born Digital : understanding the first generation of Digital Natives.) features in an interview on the Project for Information Literacy (PIL) site here.
He says "we need to find ways to give students a finer-grained understanding of what plagiarism means in the information context in which they are growing up. My view is that we start with first principles."
It's quite a short but interesting read.