I really like how the various Interestings take on different characters because of the people involved and the places where they are. Interesting South, (there've been two now) is an evening thing, because people have better stuff to do in Sydney during the day. Interesting Amsterdam involved lots of sitting on beanbags. (There are videos here.) And now David has announced Interesting New York featuring an incredibly professional-looking website which feels very NY. Anyway, David's looking for speakers etc, you should check it out.