Submitted my pharmcas on December 1st, 2003 for this year's cycle. It was not until December 19th that Pharmcas sent my material to the schools. Then completed the supplemental one by one by the end of December till end of January. Started to received interview invitations on first week of January. Started my first interview on January 31st.
At that time I had all the big ones (Chem, Bio, Calc, Physics, O-Chem, Microbio, Anatomy, Econ, Sociology) completed. So now I'm completing the remaining classes ( psycho, eng comp, lib ed) before fall semester starts.
My advice:
1. Finish as much (hard) science classes as possible.
2. Pharmcas was slow and uncheckable while putting in my transcript, so send that as early as possible with a prayer and wait until it appears on your status.