Issue 30 of  Rhizomes, devoted to Karen Barad, is now available here.  I have a highly sympathetic article in there that’s probably somewhat dated now as I wrote it a few years ago and have moved on to an ontology of folds that puts me much closer to her thought.  The article is entitled “Phenomenon and Thing:  Karen Barad’s Performative Ontology.”  Many thanks to  Karen Sellberg and Petra Hinton for all the hard work they’ve put into this!