Are you aware of how many of these niche searh engine projects exist? Also why are you putting so much trust in this guy - when this was his last project?http://en.wikipedia.org/wiki/Names_Database
At the end of the day nothing can compete with google since they have a decade+ of crawling the web. However their core product is no longer search, and being an ad platform takes precedence. Any company that goes public usually stagnates with innovation since making quarterly gains is all that matters to share holders. So someone else will take the search thrown eventually. Doubt this duckduck service could scale well if it gained more traction, considering it was written in perl.