Blekko

I've been intrigued by the new entrant, Blekko, into the search engine realm. Do you think that Blekko has a shot at giving Google (and co.) a run for their money, or are they happy with targeting niche audience? Is there competitive advantage good enough?http://techcrunch.com/2010/07/19/techcrunch-review-the-blekko-search-engine-prepares-to-launch/