I haven’t really noticed much in my main niches but according to the RankPulse chart today, this appears to be the biggest day of SERP shakeups on Google since early June. What is a little strange is that I haven’t seen much unusual commenting about changes today on the Webmasterworld Google Board. So not quite sure what is going on at the moment, but in the past I have found RankPulse to be a decent weather vane.