That's a good question. I'm not sure if there's any list of issuers. However, it...

That's a good question. I'm not sure if there's any list of issuers. However, it is an open project and therefore any entity could become an issuer. They list a few possible sources on the FAQ. I think many of the code education startups, such as Code School, Treehouse and Codecademy would be an excellent fit.