A new API to see what people build before acquiring first couple of apps and throttling access? Being able to weight my Google results with demographic or soci

A new API to see what people build before acquiring first couple of apps and throttling access? Being able to weight my Google results with demographic or social graph attributes would be more useful for me - especially with purchases. 'restaurants in 10km range popular with 30-40 age professionals' 'most popular cookery books up to 3rd degree connections' 'top movies my close friends watched last week'