Google trying to become a social network?

Google is a huge empire, they have the biggest search engine and dozens of services (blogger is one too). They are getting a huge user base from their blog, email and websites utility services (not to mention their online word processors etc..). Not too long ago they developed a service called open social, they basically want to create an online passport that works with many services, making them gain even MORE users.
What got me thinking of this was the fact that Google's reader (news, blogs etc..) gained a note feature which allows the reader to share notes with friends. Not only this bus they have been developping a feed from it (friend feed, like on Facebook). I am thinking Google is ready to create a slowly growing social network through their list of services.