Social Bookmarking Update?

Are there any plans to update the social bookmarking plugin with newer options such as Facebook Like or Google Plus?

There's a third-party plugin that uses the AddThis service to add "share" links for a huge number of services.

See their dev list post and GitHub site.

As far as the existing Social Bookmarking plugin, I don't believe there are any immediate plans to make any updates to it. Of course, anyone is always free to make their own changes and updates.