I like the idea for the standard things that a WordCamp would have. Part of the fun for me with attending WordCamps is their individuality. I would hate to see that stripped away for the sake of having an app. So that's why I say the standard things. Schedule. Reviews. Tickets... things like that. Yes definitely. Things like what's around and twitter feeds. Nah. We all have our preferences for those apps. Maybe an app isn't a great thing after all.