This is huge! I know it doesn't look huge, but it's validation. The pathology lab software I am working on has one paying customer (lab) on an annual subscription fee. One of the side channels of revenue we are developing is giving shipping discounts to clients of the lab. We just made our first sale for a shipping label today. Similar to eBay or Etsy's shipping service, the client gets discounted shipping rates and we make a bit of money on each purchase. Win win. #buildinginpublic