Not sure if it's new or not but I've just had a few results in a Google search from my Reader subscriptions.

https://lh6.googleusercontent.com/_qQsH-r_Lmao/TYnrcpKekkI/AAAAAAAABms/wLlRo-58TDM/Google_Reader_Results.PNG

This is part of Google pushing out Google Social search more widely a month or so ago.