I think people will get in off the waitlist, but if they extended the second deposit deadline to last friday (the 22nd), then I'm sure they'll need more than one work day to figure out who to admit off the WL. They probably said not to call back until the end of the week, because they won't begin admitting people until then. My guess, based on absolutely no knowledge or foundation, is that they'll begin calling people on friday. I'll be surprised if it's any sooner.
I do know one thing though... as soon as I see that first WL,Accepted on LSN, my heart will sink.