I attended both days & enjoyed it quite a bit -- more than I expected to. I'd be likely to fly to New York to attend next year if the speaker list looks equally interesting. There weren't many unresolved topics in my mind because I talked a lot to other people during the event about things that occurred to me, and asked a lot of questions.

I most enjoyed Peter Norvig's talk (largely about some recent Google AI projects) and Steven Pinker's talk (reviewing downward-trending measures of human violence.) Those seemed pretty information-dense and covered topics that I didn't know much about. I would recommend Jaan Tallinn's talk to anyone who is a "light transhumanist" but hasn't thought about the simulation argument very much -- it was very well-done, but a lot of it was about ideas with which I have already made my peace.

I thought the level of professionalism and the quality of the talks reflected well on SIAI and CFAR. It was interesting to me that about half of the people I met during breaks had flown quite a way and paid quite some money, even though they weren't tightly connected to the community and didn't always have a ton of familiarity with all the typical transhumanist ideas -- I expected that there would be less diversity in backgrounds.