A comparison on JVM Web Frameworks. Includes strategies for choosing and results from research by InfoQ and devrates.com. Also, lots of pretty graphs.
See blog post about this presentation at http://raibledesigns.com/rd/entry/devoxx_france_a_great_conference and video recording at http://raibledesigns.com/rd/entry/video_of_comparing_jvm_web
Clipping is a handy way to collect important slides you want to go back to later.