OKCon 2011 in Berlin was really a great conference and I’m really happy that I were there. Knowing what organizing conferences like this means I’d like to say a big thank you to the organizers.
I don’t have exact numbers but would think that about 200 people attended the conference.
The conference was rather big in terms of program. For two days there were five parallel tracks from 10:00-20:00. A regular slot for a presentation was only 30 minutes unfortunately so beyond some superficial questions there was no room to discuss the things presented. Also there were no time in the schedule between the sessions so it was always a hurry to change rooms. As a result everyone was in a constant hurry which made it difficult to talk to each other.