For those of you that follow Google Pagerank there was another update today August 4th, 2011. This makes 3 updates in a relatively short period of time. It is not uncommon to see activity like this from Google, but we tend to hear about the lack of updates and frequency more often.
In the past 5 weeks give or take a few days there was a Google Pagerank Update June 27th, 2011. Another Google Pagerank Update July 18th, 2011, and now this one on August 4th, 2011.
It is fairly common for Google to perform an update and follow up with a tweak/adjustment or two shortly after. Whether this is it for a while now or not nobody knows for sure.