Since shifting from my old moonflowerdragon blog at blogspot to my own hosted WordPress site, and making a second Twitter account, my link to auto-share to Facebook broke. I had also long ago failed to find a way to auto-post to Google+. But apparently I can now do the latter, and Facebook direct, via the Jetpack suite.
I am not sure how it will work given that unchecked all the boxes that would otherwise have let the app see who was in my circles, or friends list. Why would the app need to know that?