The hackathon was open to delegates and others who registered on the Geohack website. It was free to attended and you even got the traditional hackathon pizza and beer.
a great blog post.
All the teams produced excellent work, and I wouldn't be at all surprised to see at least one or two turned into real services over the next few months.
So why didn't I stay for the whole of the excellent FOSS4G conference? Well I had another hackathon to go to - of course. More on that in the next blog post.