Summer O-chem = BAD idea!!!!!!
I don't know what kind of profs/lectures/labs/exams you other guys had, but O-chem has been the the one of the most difficult series of courses I have ever been exposed to. I couldn't imagine cramming all the material I have learned into a period 1/3 of the duration of two regular semesters. Even if you do manage to pull off satisfactory grades, how well do you think you will retain the information?
In my opinion, you should stick to your PSYC, HIST, GOVT, ECON, (insert utter-waste-of-time course title here) pre-reqs during the summer, not courses relative to material you will see on the regular basis in pharmacy school.