The videos from this year's GNU Hackers Meeting in Paris are up. All the videos are linked from that page. There were technical problems with a couple of them, and we didn't get BT Templeton's presentation on Emacs Lisp in Guile (using delimited dynamic bindings to implement buffer-local variables!), but all in all it's a good crop.
I gave a talk entitled "The User in the Loop" that argued for the place of extensibility in the GNU project. I also pointed out some ways in which Guile fulfills those needs, but that was not the central point to the talk. I argued that point at more length in a previous article.
Anyway, let's give that newfangled HTML5 video tag a go here. It starts with the cut-off statement, "We all know that code motion is very important to efficiency, so..."