More to explore:
Is Google going to hurt your site's traffic as it improves as a search engine?
Will Google Hurt Your Site By Improving Itself?
Google announced a new change to its search algorithm today. Starting next week, the search engine will begin taking into account the number of valid copyright removal notices in rankings.
Then vs Now: How Things Have Changed from 1982 to 2012
Listen to Google tell you how to get your web presence working well from their point of view - then put the advice to some use