This information is from last year, it might have changed.
I recieved a letter. It came in a thin envelope. They send out acceptances and rejections in batches. I remember looking on SDN and seeing that people were getting in with the batch when I got my letter. But it is not a sure fire forecast. Just wait for the letter. Good luck and best wishes.
Hope you guys end up in the class of 2007.
I love it here and if you have any questions feel free to ask.