What if Google opened its index and created a search market place? Are there domain/location specific apps that can be built around/on top off those returned results?
The cost would be a huge factor. If it's free, I wouldn't build anything, because that's a recipe for "Oops, Google deprecated our business model."<p>If it's not free, there's still a concern that Google could borrow your business model.<p>Basing your business model entirely on the content from a third party service has shown, in recent years, to be a nearly complete disaster.