I think we are going to see a lot of "movement" this week. I know I said that last Sunday too and then absolutely nothing happened for me, but I believe for others there were some interviews?
I looked at past postings on gradcafe about some of my schools. It looks like many (not all!) of them interviewed at the end of January and offers were made as early as the beginning of February. WOW!.
If I don't hear anything next week I will send an "innocent" email to 1-2 schools the following week just to get a feel for where there at with the admission process.