tedster - 7:25 pm on Apr 27, 2008 (gmt 0)

I think the specific event that we called "Dewey" is over and gone. But Google continues, as always, to tweak and change and adapt. 450 algo changes were rolled out last year - more than one a day. So we can't look for stability.

Ever since the position #6 bug hit, I'm convinced that one long term goal is what the Google spokepeople have called "diversity" or "serendipity". I think we'll continue to see volatile SERPs in some areas for a ong time because of this.