Miguel Helft of The New York Times has written a great article entitled, "Looking for the next Google." In it, he mentions Powerset, hakia, ChaCha, Snap, and Wikia as well as Yahoo, Microsoft and Amazon.com.
Esther Dyson, a well-known technology commentator and Powerset investor, is quoted in the article saying, “There is way too much obsession with search, as if it were the end of the world.” She adds, “Google equals money equals search equals search advertising; it all gets combined as if this is the last great business model.”
Now, there's a quote you can take to the bank. ;-)