Yahoo and Microsoft are apparently collaborating and will come out with a new search in the next month or two. Google’s days on top might be numbered. Combine that with a prosecuter going after them on underage or kiddie porn. Their stock could be in the tank in a month.
As long as the patented PageRank keeps the average amateur web surfer fat, dumb, and happy, Google will go nowhere. As for kiddie porn, the thrust will probably fail at the USSC; no mechanized search can practically be free of that or any other verboten item.