Each presentation was 30 minutes, tops. I actually prefer that format to the longer time slots as it keeps things snappy, the presenters have to get to the point and -- to me -- it seems to fit better with the "here and now" of social media.
People wandered in and out, sat on the floor, good-naturedly heckled and I found it to be a great networking opportunity, more so than mesh actually, although that was that a cool event too.
And the best part, it was all free. It's on tomorrow too.