Closed development with Trello?

[simendsjo]

D has been following a very open development process.
There are public newsgroups, mailinglists, wiki, bugzilla and github.
But as I understand, much development discussions (and/or planning?) have  
been moved to Trello.
It doesn't seem to be a way to join in as a spectator (or even search for  
boards), and it feels like a big step in the wrong direction.

Is it possible to make the Trello part open too?