Hi phdhope...
Like you, I still have heard nothing from Georgetown...no email, no rejection letter waiting for me when I log into their app site. I've contacted the department's grad coordinator for more info and she is looking into it. She indicated that all students should have received notification by now. (maybe a glitch in their system??)
I expect to receive a rejection letter in the next few days because, as hanlin pointed out, all admitted students received notification in February. If you don't hear back from them soon, perhaps give them a call to check on the status of your app.