Rotated, but didn't get an interview - now what?

I rotated at a program in October, but didn't get offered an interview. I did all the usual rotator stuff (worked hard, showed interests, etc...I don't think I was denied because I was a doofus or the residents hated me). I called the program early December and they told me my step 1 missed of their cut offs, but I was not outright rejected. They do not use step 2 (the higher of the two for me) for cut offs. Basically I was told by the program coordinator secretary that if something opened up they would let me know. I know they have 4 interview days in January, what should I do to let them know that I very interested in the program? I already sent a thank you letter to the program director about a week after my rotation there. I feel it could be counter-productive to call/e-mail constantly as that would annoy the PD's secretary but I still need to stay in contact with the program in order to get something if it does open up. What do you guys recommend?

If you say what the program was, you may find that other people are in the same boat. Some programs have a ton of rotators and don't interview many of them. Otherwise, talk to the coordinator. They usually are more responsive than program directors. Email may be better, they get tired of calls I'm sure at this point.

Just to clarify, I have not spoken to the actual PD outside of my rotation. I assumed that most PD coordinators handle the initial screen - apply whatever filters or cut off, send that pool to the actual PD, who then reads through and basically fine tailors the list some more to get the first wave of invitations out and fill the interview days as needed.

I e-mailed the PD coordinator/secretary person twice in December, one being the "hey I haven't heard back yet about an interview invite" and another generic "hey are there any openings yet?" about a 2 weeks in December...I knew it was kind of futile at that point since all of their interviews were in January and any possible shifts or openings wouldn't have occurred yet.

I guess my next move would be to e-mail or call at this point and just check in again. Does anyone see as this a good move? Basically I don't want to be pushy or break some sort of unspoken rule but I want the program to keep in mind if something comes up.

As long as you're respectful in your email, I can't see it being a problem.

Word. Well I guess I'll fire off an e-mail to the PD coordinator and keep my fingers crossed

If you rotated and didn't get an interview, the chances of you matching there from a pity interview are about 0%. It would be a waste of your time to keep pursuing a program that is not interested in you. Obviously this sucks, but it would really suck to have you plop down more money to go and interview at a place that doesn't think you are a good fit.