The signals and chatters of a Google Search ranking algorithm were reported about a week ago. After discussing over the matter over a couple of days, the chatter died down. Right now the chatter and signals of another Google update is on the rise. It seems not much of a major update but it might be specifically targeting the niches or just acting as a test for something. It is not easy to say anything at this point.
The Webmasters are having some ongoing discussion on this update. There is some chatter going on in the black hat communities too but that is too limited at this moment. The chatter started heating up this morning and the SEOs are keeping a close eye on the matter.