I don't know if you were informed about the AMCAS shortcomings last year..... muahahahahahhahahahahahahahha <gasp> hahahahahahahaha.
But seriously, the website was supposed to open May 1 last year, and I think I finally got on it May 25. I would not expect that same sort of delay again this year, but you can imagine >1000 anxious pre-meds trying to log on at once. The website might not be able to take it. It's like a twinkie put in front of Rosie O' Donnel, it never had a chance.
They'll prolly open it up at some strange hour... like 4:20pm. You never know, those AAMC people must be smoking something.