I see Lion Brand has finally acknowledged the woman who made the poncho for Martha:
Quote from their latest newsletter "Lion Brand would like to recognize the woman who hand-crocheted the now-famous poncho. Although the prison will not release her name, one newspaper reported that it was Xiomaro Hernandez. We honor her creativity and the wonderful inspiration she has provided to many people. Lion Brand will make a donation of yarn and crochet hooks to the Alderson prison facility in honor of her work and her generosity."
Go here for the knitted version: Note they only have a picture of the crocheted version....