We tried to crack this nut back in 2006. It's tough. If you don't have an event someone is looking for, they'll never come back. It's impossible to offer 100% nationwide, or hell, even regional event coverage.<p>For example, I just tried your app and it came back with zero results. Do you think I'm going to launch it again?<p>Event apps/destination sites are some of the most attempted businesses out there. Some have even raised tens of millions in funding without really making a splash, mostly due to the problem cited above.<p>I've pontificated ad nauseam about what I think could potentially work in the event space, but it all gravitates towards a single point: focus on niche and grow organically.<p>Good luck.