Actually – good point: it's next to impossible. Where in SF should you look for a cofounder? A friend of mine said only look at folks you've worked with before.
Me too, but you need to get funded by them to participate :)
One important improvement is that it looks like they go the full product release cycle and incorporate the feedback into something testable with real users, so they go from idea generation to actually testing products or features by the end of the week.