The SEO & webmaster community collectively-crapped themselves upon learning that, this summer Google will be rolling out Penguin 2.0. According to a recent video released by Matt Cutts
of Google, this greatly-enhanced version of Google's spam-busting
technology will take a direct aim at bogus spam sites, sites with
unnatural backlinks, and other forms of trickery used to improve page
rank.
http://www.samuelpizzo.com/blog/google-penguin-2.htm