Google has launched the very neat social search feature yesterday. I am honestly surprised there is not more discussion around it in the forums. We covered it three times, first for the demo, then when it went experimental and then with some technical issues.
Well, it is now live. On by default. Honestly, I don't believe it impacts normal searches unless you specific choose, "show options" and click on the social feature.
But when you do, it opens up a world of new searches based on your online social profile (which you may or may not have).
Here is my social circle as found by Google:
Here is my social content:
Here is a detailed look at the "paths" on how I am associated to one of my contacts, JohnMu at Google:
Forum discussion at Search Engine Watch Forums.