Google continues to make changes at a fantastic pace.

A huge piece of news, In the last few weeks they launched Google+ (their latest Facebook competitor). That is still being tested and rolled out. Will they succeed this time? We'll see.

One thing that has now become routine, Google's Panda algorithm change is now being updated monthly. These h are designed to help Google do a better job of sorting out the wheat from the chaff - the quality websites from those that try to LOOK like legitimate sites but are full of garbage, low-quality content.

Article on the subject:

Official: Google Panda 2.3 Update Is Live

Since it is possible for any website to be affected by these changes, you definitely need to pay attention to your rankings, and traffic to your site, and to work continuously at improving.