Thing is, the director isn't a teacher. Thinking of it as being there to learn is probably a mistake -- that's what an intern is for. And if I were you, I would definitely be approaching the producer about things like having something to do, rather than the director. But I'm assuming that you did this b/c they're the head of the club, right?

You need to consider their point of view -- there are a huge amount of reasons they might not have gotten back to you. This person is managing their own school work load, running a club, and directing a film with a decent sized budget. That really would take up a decent amount of their time.

Wait until after the meeting to speak to him -- there's a chance you could be assigned a task/role at the next meeting. If you do want to speak about it, the best way to go about this is to be non-aggressive, and non-demanding. Just ask what they thought of your work (specifically things like, "do you think my skills would be a good fit?" So as to avoid a messy social situation and potentially put both of you into a bad position within the club).

And most importantly, look up the university's handbook for clubs and societies. If he's doing anything against the rules, speak to someone. If not, suck it up and do what you can on the production. For some of these students it's going to be something they put on their resume and show to potential employers. Keep that in mind before you discount the use of people with previous experience, simply because the director chose them over you.

Being a director can turn completely wonderful human beings turn into total pricks. I'm in film, and I've seen/heard about some nasty behaviour from people I had nothing but respect for previously. And understandably -- the director's name is the name most strongly aligned with the final product. It's a hugely responsible position.