Day three was really hard core, many good talks such as howto run your own GSM network, RFID Security, DECT In-Security, Cisco exploits and attacks using office documents. Of course I couldn't see all of them but the videos of most talks are already available.
My NFC talk went quite nice I think. Also I kind of went overtime (+20 minutes), since I didn't get thrown of the stage I just continued :-)
Day four was very short for me since we already left at 2 o'clock to catch our flight. I only attended the Debian RNG talk which was very nice, good demos and fun slides.
All in all the congress was just awesome. Also it was way to crowed the first two days.
Happy new year everybody!