I think this was a long time comming. Google finally changed it's search algorithm.

The new changes will hit hard on websites that don't have their own content and instead copy content from other websites. These include eHow.com, owned by Demand Media.

A content farm is a website that uses different methods of stealing content from other websites. These methods range from using top search engine hits on different keywords to actually copy-pasting content that would only be accessible to registered users.

The drop in traffic will rise up to 80% in some cases: 78% Mahalo, 61% Associated Content, 51% Examiner.com

What does this mean for you? As long as you don't get your content by ripping off other websites, you'll be fine. If you do, then you deserve it.