I think you're off to a good start with the LOI. Unfortunately, I don't know that there's much you can do other than to continue to let them know that you're still interested and/or they are your first choice. Search the pre-allo forum, and you'll see there are dozens (if not hundreds) of threads in which letters of intent and interest are discussed.
I'm certainly no expert, but if it were me, I would just be persistent and keep up with letting them know that you're still interested (without going overboard or being annoying/overly aggressive). You sent a letter of interest, now if you have anything new to update them on--even if it's something you told your interviewer, but are unsure if they have in writing--send an update letter and use that opportunity to remind them how into the school you are. You can send a letter of intent if Einstein is really your number one choice--this is kind of like a letter of interest, except that you make a clear, definitive statement that this school is your top choice and you are completely committed to attending if accepted, above all other schools, etc. You can send in a new LOR (from someone you're currently working for, for example) if you can think of one that might help. You can just call up the office now and then to check on your status/the status of the waitlist, let them know you're still interested, and so on.
There are plenty of people on the waitlist. You just don't want to fade into the background. Schools like to offer acceptances to people that they know are really enthused about the school and will come if extended an offer. It makes them look good, and they like to have people who are really happy to be here, who are right for the school and who the school is right for.
I remember seeing that thread...you have to keep in mind the people who are vocal and go to the effort of making threads are the ones who are pissed off about something (much like the reviews on those Rate My MD type sites). Not exactly an accurate representation. I'm sure you know that, though. That said, I think issues like that do happen on occasion almost everywhere, just depends on everyone's unique circumstances. FWIW, The 3rd/4th years that I've met are all happy and have had nothing but good things to say when I've asked about how things are going. I don't really know any well enough to refer you to them, but you can always call the admissions office and ask if they can put you in touch with one to answer your questions.
to those waiting for AECOM, pre- or post-interview 🙂
