AOA means very little (in terms of hurting you). If you have it, then it MIGHT help you. If you don't, not many people care. My med skool didn't even post AOA until after the match, as many med skools don't. The main thing is that you pull down a few honors in the "big-gun" rotations (i.e. med or surg) and avoid failing (or just passing) any clerkships during 3rd year.
I agree with the importance of "rocking your aways," not being a freak, and doing "well-enough" on Step I so that it's not an issue during interviews. What's that score? I have no idea, but I got a 228 and only one interviewer mentioned it (out of the 12 programs that I interviewed at 5 years ago).
I talk a lot with the Chairmen of our program and other staff members about what they look for in an applicant. On interview day, Most take a glance at the step 1 score (#1 by far). Then they peruse your LOR's to look for the "big names" or people THEY know. They look at your research/publications. They may or may not note what med skool you attended and how well you did in Surgery and Medicine. And quite a few of the attendings actually care what you do in your free time (that damn "hobbies" section). The rest of the time is spent weeding out the "pathologic" personalities during the sit-down interview. These are some of the "important points. And at the rank meeting we screen our top 60 or so, and I have never heard AOA mentioned in the 4 years that I've been in this program.
Just my 2 cents