During my interview last year, I wasn't asked any DIFFICULT ethical questions nor was I given a myriad of hypothetical situations to respond to. The questions they ask aren't to set you up for failure--rather they want to know how you will respond to different situations. The purpose of the interview is to get to know you, understand your motivation to become an Osteopathic physician, and see if you are a fit with the school (in their opinion).
FowlersGap, you aren't TOO late. AZCOM usually stops interviewing by December and then starts up again in the spring (there are a number of people in our class--2007--who interviewed on the last day of interviews and who were accepted). During the interview, the interviewers do not see your scores/grades--they want to get to know more about you (at that point, on paper you are good enough to get in--now they want to see if you are a good match).
As for the heat--it is hot here during the summer, but winter should be great (it has already started to cool down). Besides--it?s a DRY HEAT 🙂
Good luck and if you have any more questions, feel free to ask.