I spent a week in Toronto, Canada attending the OpenBSD t2k13 hackathon hosted at the University of Toronto. While these events are put on every year in random places, I have not attended one since c2k7 in Calgary back in 2007. I tried to go to the Portugal hackathon last year but my travel plans got all screwed up.
I wrote about the technical details of what I accomplished at this event at the OpenBSD Journal so I won't duplicate it here, but it was a fairly productive week for me. I remember at c2k7 I didn't really have much to work on and felt out of place but this time I had more things to do than I had time.