UPDATE 07/15/14 3:15pm CST: Etsy reports that they've made some changes to the configuration of their network, which led to these problems as an unintended side-effect. They believe that they've addressed the source of the problems, and on our test sites the data is flowing again. We're going to call this issue closed, but if you have any problems, please feel free to contact support.
Thank you for your patience while this got sorted out.
UPDATE 07/15/14 11:38am CST: Still no resolution from Etsy. We'll continue to pester them in the hopes of getting this resolved quickly.
Several customers have reported that Etsy-related functions -- such as "pushing" products from their IndieMade site to Etsy, or adding new products to the store when these products are to be automatically "pushed" to Etsy -- are failing. We've verified that Etsy's servers are not recognizing IndieMade's servers, and have a ticket open with Etsy to take a look.