Google Farmer Update: Quest for Quality - SEO-Blog
I haven't looked at all the metrics, but apparently Ezine was the 2nd biggest loser. Other 'big' sites such as wisegeek, hubpages, buzzle, articlebase, and business.com were affected. They are calling this the Farmer Update.
Great. It appears that all Google updates from here on in are going to be named, just like Hurricanes.