For for the Social Search enriching the Web Search:
With +1, Google Search Goes Truly Social — As Do Google Adshttp://techcrunch.com/2011/03/30/google-plus-one/
On Google+ people find me. I am actually glad that the pace and the discussions on Google+ slow. That I actually can arrive at the end of the stream and connect with the stream I read yesterday. Facebook & Twitter is sometimes overwhelming and in the brevity of the posts rather fleeting.
Google+ is more the enhancement of my Google centric life, I use Gmail exclusively as my e-mail client with a dozen e-mail address for receiving and sending. I use Google Reader and of course Google Search. I used Picasa before I used Flickr and will use it some more now as it's all together here on Google+. The Google+ Toolbar is ubiquitous, that's why Google+ content received faster attention than facebook or twitter.
But I have no expectation to be entirely social her except for a few close friends that are in my circles. Friends whose postings I hardly read in other SNS anymore, because they drowned out by the noise and wouldn't bubble up on facebook for what ever reason.
I tread the time when 'brands, corporations & nonprofits' will enter the Google+ space and use it also as a means to broadcast, rather then engage or be relevant.
I think the biggest hurdle for Google+ is to manage the noise. Seems they know it and bid their time to figure is out.
Just a few random thoughts.....