Sounds great... but given that medium is owned by one of the twitter guy, I would think twice before building anything serious on top of this API though this is a publish only api so it should be fine (twitter publish api is still pretty ok).
I'm really surprised that they are touting the ability to cross-post. Is this ever a good idea for authors? In the absence of some very specific markup [1] you're likely to incur search penalties.<p>[1] <a href="http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html" rel="nofollow">http://googlewebmastercentral.blogspot.com/2009/12/handling-...</a>
Some of their suggestions for API uses that are more akin to "cross-posting" of automated data are interesting.<p>I wonder if they will also expose consumption APIs at some point (maybe even just statistical data and not full text?).