Taking on Google?

Link: The Next Google Search Challenger: Blekko. It is clear that there is still plenty of room for innovation in Search, but it is a lot less clear, if/when the innovation occurs that it is: 1) compelling enough to unseat Google; or 2) cannot be replicated by Google, even if it takes a ton of money to do so. Maybe the play here is that Google buys these guys? Many people took on MS and failed. Google won by inventing an entirely new category, same as MS won over IBM.

I don't believe that there is any examples of a dominant company (in recent history) that was unseated by an upstart in a domain where it is dominant. That obviously does not mean that it is not possible, but I would certainly not bet on it.