Google announced they are now incorporating Google + posts and information directly in the search results.
Here is a picture:

Now, prior Google did show these types of information with Twitter results and even based on your Google Profile public links profile. Now, Google will show all the public posts that you or your friends made in the search results.
Google said:
Remember, to experience this updated feature, you’ll need to be on Google+ and also make sure that you’re logged into your Google Account when you search. In addition, only public posts on Google+ are visible in search results. Private posts on Google+ aren't.For more details see the help center.
Forum discussion at WebmasterWorld.

Comments:
Black Seo Guy
08/16/2011 04:05 pm
This does not surprise me at all..because it is Google +
Perfect Search Media
08/17/2011 05:50 pm
Had to see this coming As the Google + user base continues to rise, this will become an important factor in marketing to you consumers. Recommendations from friends and family have much higher conversion rates than a simple search.
Chavi
08/17/2011 08:39 pm
Can you opt out? It will make the SERPs look really messy, and it will discourage me from following random people on Google+.
Alan
08/17/2011 10:56 pm
This seems awfully dangerous and all of a sudden someone's "private" post goes public.