Last week I received an invitation to join Google+ (Google's version of Facebook). I don't use Facebook and don't entirely trust Google so I won't be creating an account, but it did get me wondering: does the internet need another Facebook?
Usually when I'm online, I'm looking for an answer to a question or a solution to a problem. To visualize that process, and hopefully provide some context for a new social network, I came up with this Venn diagram that identifies the available various pools of people...
Based on this, it seems like Google+'s goal would be to make the green circle bigger - but I don't think that's what happens. Closed networks, like Facebook and (I presume) Google+, at best only make their portion of the green circle bigger, but often don't even make it into the green circle at all*. This can actually make it harder to find answers, as homopholy might keep us using the most convenient resource, instead of the most appropriate one.
The important thing to remember is not to rely on one tool for everything - closed-loop social networks are good for keeping in touch with friends, but open forums like Ask Metafilter, Ask Slashdot, or Quora are better for non-social answers (but okay for those, too).
So with that, the question is: is Google+ a better way to keep in touch with friends? It seems like the answer would be "no" if the critical mass of your friends are already on Facebook (and unlikely to switch, or unlikely to maintain both). But from initial reviews (also this), it sounds like Google+ has some cool ideas, so its real impact might be gauged by how quickly Facebook adopts the best features.
And the next question is: have any libraries started using Google+ to connect with their patrons?
*Note that one of the qualifiers is "people who know what they're talking about" - a social network might make it easier for me to get my question out to people I know, but it doesn't help if no one I know knows the answer to my question (which might just indicate that I socialize with the wrong people).