Looking in at Dennis' blog, I noticed a poem that made me laugh, but also really want to figure out what was going on. Turns out that Mike of Vitia, Clancy of Culture Cat and several other agencies were discussing plagiarism and the way to catch it. The discussion is opinionated, thorough and very interesting, go have a look. I do recommend starting with Dennis' poem though, as the pages of arguments are packed with all those hard words that don't stick in my little head Sunday morning.
Important acronym in this discussion: PDS - Plagiarism Detection Service.
(Clancy's post has several links to Kairosnews on this, look there for more links, I have been unable to retrieve them for some reason.)