The previous posters have already given good advice. My question to you is how strong is your application? If you have a very good all-around application (high GPA, expected high MCAT, good extra-curriculars/volunteer/work experience) then the August MCAT won't be an enormous hindrance, although it does make things more difficult for you. There are lots of posters currently who took the August MCAT and are having a good amount of success in the process. However, it also sounds like they had very, very competitive applications to begin with. If you have a more borderline application, it is probably in your best interest to wait another year -- if you are borderline and late in the rolling admissions process (which you will be because of the MCAT), it seems to hurt your chances much more. If you do decide to apply this year with taking the August MCAT, my best advice would to still get as early a start on your applications as possible. Aim for turning your AMCAS in during the first week of June -- many schools will automatically send you secondaries -- turn those around as quickly as possible (within a few days if you can). Then, everything will be ready to go once your MCATs are received in the fall.