Venturebeat has an interesting Q&A with Marissa up, in it she points toward social search as a major area of development for Google.
She hints Gmail may be used to identify your friends, using their search history to influence search results for you and those in your social network. While this network would likely first be built on Gmail contacts, Marissa wouldn’t rule out importing friends from third-party networks down the road.
I think Google is struggling to figure out its approach here. Should it build a “traditional social network” like Facebook or Orkut? Should it simply be a directory, and provide a platform instead (like Open Social)? What about indexing and crawling all this social content? Will it prefer its own content?
The plot thickens.