onepointone - 5:25 pm on Sep 16, 2011 (gmt 0)
I can definetly see google & other SE's going pay to play. For commercial terms, of course. The 'organic' listings might start on page three, whatever. They've already moved strongly in that direction.
Joe average just want's to find what he's looking for. Ad or not, he doesn't care that much.
Searches like "mating habits of the African water buffalo"? Well that will stay ""organic"".