Twitter cofounder Evan Williams (pictured right, with Tim O'Reilly) will certainly be invited back as an expert panelist at next year's TechCrunch50 conference. in addition to taking a half day to judge nine of the launching startups, he wrote a long blog post today with his "day after" notes, saying "I find most of the implications of a product or company, if it's really interesting, aren't immediately obvious. You need to have some time to sit with it." It's amazing how much time the experts spend thinking about and talking about the startups they see present. We are very lucky to get them.