The main organizers were the teachers of a local technical school (the IES Padre José Miravent), and they invited me to give a talk about NetBSD development. I will publish the slides soon, but I have to warn you that you will not like the source format, aka PowerPoint. Being part of the university personnel, I was given a copy of Office 2008 for Mac and I wanted to give it a serious try before judging it. It is certainly more powerful (or easy to use) than OpenOffice Impress, but it is also a lot slower; I don't know what they have done there, but the application feels really really sluggish.
Anyway, back to the point of the conference. It has been great and surpassed all the expectations I had. The organization was excellent, the people was very nice, the food was (very) abundant and the talks were interesting (except for a couple of exceptions). What else could you ask for?
Just as a point of fact, there were around 300 registered people, and I guess around 100 of them came to my talk (it was first hour in the morning); that's a lot more public than I have ever had before, and it was a really exciting thing. I hope the listeners enjoyed it as much as I did.
The only thing I regret was not staying there one more day (after the conference) so I could go around the town and take some cool photos. Maybe next year :-) Ah, speaking of next year: if you get invited to give a talk, don't think twice and accept the offer!