Been messing around with Google+ for quite a few days. To me it is a simplistic version of Facebook still in its infant stage.We Googlers don't have much to play around at the moment, though we can be sure the big boys at Googleplex aim much more than that. It won't be long until the witty developers start plugging in all its fancy services and apps into this neat yet powerful platform.
Think Google Docs, Calendar, Reader, think how we the users will shape the search results while we allow our posts to be searchable.
This is how I think they might integrate its many services into Google+. And it won't be long until we'll be able to put our hands on them.