I have a Club on whose splash page I'd like to include a post feed from that Club's forums.  However, that doesn't currently seem possible.

Club forums and blogs should be included as options in feeds (permissions permitting).

Right now the only way to include Clubs forums in feeds is to keep the All checkbox checked, which obviously isn't a solution.  I'm not sure if this was/is a bug or if this was somehow intended. 

Yes. There should be a way to give a club it's own environment ... with its own topic / post feed boxes which do not spill over to other clubs etc...

Good catch @liquidfractal