AS you say, the value is in the data, not in any website or iPhone app you may build on that. So you could expand the data, build an iPhone app just for kicks,

AS you say, the value is in the data, not in any website or iPhone app you may build on that. So you could expand the data, build an iPhone app just for kicks, and try licensing or selling that data (not the app) to companies. The value is in the data, and perhaps even more so in the systems you build to expand that data and keep it up to date. That's what you can license/sell.