A friend of mine interviewed there a last week and she said they told her some of the accepted students will be called Dec 1st. The rest of them will be notified in a few weeks after the admissions committee meets after the Thanksgiving break.
I was there a week or two ago. They told me that they were going to meet after Dec. 1st to decide who was in or not. They stressed that they do not get together until after Dec. 1st so not to worry if I don't hear back ON Dec. 1st. Hope that helps
Just to let everyone know... I called the admissions office today at SIU and Angela Pritchett told me that the committee was meeting today and acceptances are being sent out tomorrow. I did not ask if they were going to call, update AADSAS, or send it through the mail, but we should have some kind of answer fairly soon. Good luck!