Fantastic plugin. The developer isn't kidding when he says in description that this one kicks ass.
My one last remaining peeve after release of 2.1.1 (which fixed my other peeve) is:
if a photo is not linked to the media file (and linked to, say attachment page, another page or an external page) then clicking on it pops up Social Gallery which presumably attempts to find the linked media file and failing to that, closes in a couple of seconds....
Ideally, Social Gallery should recognize that the image is not linked to media file and gracefully fall back to the link URL.