First thing you should do is make sure that in any prior communication the school had with you, they did not mention WHEN invites would go out. In my initial 'thank you for applying' letter I state exactly when invites will go out, yet still got calls a week prior asking. THAT is annoying and tells me I took the time to write a comprehensive message and this student basically said blah blah blah, whatever. Which means I will then have a resident who says blah blah blah, whatever, something I do NOT want. So please, be sure that this information wasn't given to you prior (a simple list of programs and tidbits about each gathered throughout the process should take care of this). If not, wait a reasonable amount of time (I would think now, as December is upon us is reasonable) and give a QUICK call. When I hear, "Hi, I'm a 4th year..." I pretty much know what the question will be if it's after our deadline. Just make it short and sweet, "Can you tell me approximately when interview notifications will go out?" Many coordinators DO have a say to some degree. Personally, the only time I would ask a student for their name is if notifications went out and for some reason they did not receive one, I will tell them over the phone (good or bad). I don't need your name. I strongly disagree with coordinators who do not send everyone a yes/no/maybe email, it's only fair to all of you. Maybe if those people get 50 calls a year asking for status and she ends up having to tell each of those people via phone that they aren't getting an interview, it will change her mind for next year and she'll send out 'rejection' letters. You've got to learn somehow.
Be nice to the coordinator (I'm not just saying that so you'll be nice to me). Before interviews, at interviews, after interviews. They are the eyes and ears for the PD. Don't kiss up, but be yourself and never cop an attitude or behave unprofessionally. I can guarantee you there are students whose rankings were lowered based on being rude or demeaning to a coordinator.