I'm not so naive to think that people aren't already doing this all the time, but how is that the SaaS products mentioned in other comments are able to (and/or confident they will continue to be able to) avoid getting a C&D letter from Google? Isn't this a violation of their ToS? Even using a supported API--which for Google seems to be limited to 100 queries per day--the search engines are officially OK with the subm…
Nobody _actually_ cares.