He's given up.
The crowd-sourced project at GuttenPlagWiki published a summary (in German) of the most interesting bits of plagiarism found during these intensive days. It's fascinating - and very well done. They have worked hard to remain scientific about this, slapped down the gleeful punks (they get rid of their excess energy in the chat: "Mein von mir verfasste Plagiat ist keine Dissertation", my plagiarism written in my own hand is not a dissertation), and brought it to a sharp point. I spoke briefly - and anonymously - on the phone with the main author today. He is said to be a doctoral student, and I think he did a smashing job getting this organized and sorted out and written. And very nicely sourced.
Guttenberg announced this evening, just in time to squeeze into the evening news that he reread his thesis over the weekend and has decided to ask the university to rescind his dissertation. He will hand back the certificate, and asks forgiveness from his mentor. Oh, and he's staying Minister of Defense.
The university still needs to continue the proceedings, I feel. And I very strongly suggest that the University of Bayreuth take a deep, hard look at how the mentor doctoral students and how they go about determining grades.
On a side note, it was fascinating to watch a grass-roots movement with some simple, sharp tools (a wiki, a chat, a forum, a scanner) deconstructing the text, determining the sources for most of the pages and even visualizing how the thesis was written: copy & paste, change a word here and there, move some stuff around, translate a bit mechanically. This is the stuff that can radically change science: working in the open as opposed to a closed lab; fending off opponents as you work; and collaborating instead of working alone.
Thanks, Wikia, for providing the storage space!