I agree with the Google+ approach too. Its obviously not as popular as Facebook or Twitter (or even Pinterest) right now, but Google is putting a lot of effort behind growing it... its just a matter of time before it becomes a major influence. The impact on search results has huge potential.
That's why I have been working on expanding my circle... best to *try* to get ahead of the curve!
Here's an article I put together with some strategies to grow your Google+ circle (no tiny URL