Google recently announced Google+ Your World search which where google users will get results that include information from people they follow socially. Matt Cutts, the chief of Google Webspam prevention went further in recent comments suggesting that those engaging in Hyper SEO practices run the possible risk of being delisted by Google.
Hyper SEO tactics most commonly used are paid blog/comment postings and using mini sites to build links to sites. The danger signal is when the search engine is seeing a lot of links to the root domain and not a lot of deep links. Interesting sites generate lots of new page content and interested readers who share them.
How do you deal with this change? Simple start creating interesting content! If you really engage in social media and start talking to your audience through blog and social outlets, your going to gain the benefits of the increased engagement and avoid getting slammed by Google.