I, too, was excited about this. The author put in a lot of effort. It's a real shame, but very hard to get the network effect.
I suggest Reddit. There's a lot of this kind of discussion happening there. There are big subreddits like /r/science.
FWIW, we (Crossref) found only 13 links to DOI-registered content in its lifetime: http://api.eventdata.crossref.org/v1/events?subj-id.domain=u...