I participated the first randori coding dojo session in Helsinki today. In short: it was fun.
It was really great to see other people in action, making decisions using TDD with people they had never met before. The discussion was really interesting. This was also one of the most controversial things about the randori session - I think the audience was suggesting a bit too much on the implementation side, but on the other hand, that way all of us perhaps got to hear more views on the problems that we would have otherwise. So, it's hard to say whether the future sessions need to be more disciplined or not. Either way, I'm definitely going to join them.
Thanks again to all the guilty parties (Markus, Pekka, Lasse)!